An indoor unit of an air conditioning system is provided. The indoor unit includes a fan, a control box that includes an inspection port on a first side surface, and a casing that houses the fan and the control box. The casing includes a first flow port in a bottom surface of the casing, a second flow port in a first side surface of the casing, and an opening opposed to the inspection port in a second side surface of the casing. The control box comprises a first leading port on each of a second side surface and a third side surface of the control box, the second side surface and the third side surface are opposed to each other and adjacent to the first side surface, and the first leading ports lead external wirings into the control box.

An indoor unit of an air conditioning system is provided. The indoor unit includes a fan, a control box that includes an inspection port on a first side surface, and a casing that houses the fan and the control box. The casing includes a first flow port in a bottom surface of the casing, a second flow port in a first side surface of the casing, and an opening opposed to the inspection port in a second side surface of the casing. The control box comprises a first leading port on each of a second side surface and a third side surface of the control box, the second side surface and the third side surface are opposed to each other and adjacent to the first side surface, and the first leading ports lead external wirings into the control box.

A cable includes a transmission cord having two connecting terminals formed on two opposite ends thereof, two connectors respectively mounted on the two connecting terminals of the transmission cord, two end caps mounted on the transmission cord and respectively connected with the two connectors, and at least one demagnetizing layer mounted on the two connectors and received in the two end caps. The transmission cord includes a conducting wire, an insulating layer wrapped around the conducting wire to insulate the conducting wire, and a protective layer wrapped around an outer face of the transmission cord. The at least one demagnetizing layer is made of graphene to prevent the electromagnetic waves of the ambient environment from interfering with the signal transmission of the transmission cord.

A communication cable that has a reduced diameter while ensuring a required magnitude of characteristic impedance. The communication cable contains a twisted pair that contains a pair of insulated wires, twisted with each other and a sheath covering the twisted pair. Each of the insulated wires, contains a conductor that has a tensile strength of 400 MPa or higher and an insulation coating that covers the conductor. The sheath is made of an insulating material having a dielectric tangent of 0.0001 or higher. The communication cable 1 has a characteristic impedance of 10010.

A communication cable that has a reduced diameter while ensuring a required magnitude of characteristic impedance. The communication cable contains a twisted pair that contains a pair of insulated wires, twisted with each other and a sheath covering the twisted pair. Each of the insulated wires, contains a conductor that has a tensile strength of 400 MPa or higher and an insulation coating that covers the conductor. The sheath is made of an insulating material having a dielectric tangent of 0.0001 or higher. The communication cable 1 has a characteristic impedance of 10010.

The invention discloses an acousto-optic audio signal cable which includes an audio wire cluster, at least one LED marquee light wire or at least one illuminating line parallel or spiral twining around outside or external wall of the audio wire cluster and an acousto-optic controller. The audio wire cluster and the LED marquee light wires form a cluster which is coated by a transparent insulating layer. A main circuit board of the acousto-optic controller includes a sampling amplifier circuit component, an analog-digital conversion circuit component, a microprocessor and an output driver sequentially connected. The audio wire cluster is connected to the input end of the sampling amplifier circuit component. The LED marquee light wires are connected to the output driver. The acousto-optic audio signal cable is simple in structure, convenient to operate, dynamic, fashionable and capable of synchronously flickering light during tone and rhythm changes of instrumental performances and speeches.

The invention discloses an acousto-optic audio signal cable which includes an audio wire cluster, at least one LED marquee light wire or at least one illuminating line parallel or spiral twining around outside or external wall of the audio wire cluster and an acousto-optic controller. The audio wire cluster and the LED marquee light wires form a cluster which is coated by a transparent insulating layer. A main circuit board of the acousto-optic controller includes a sampling amplifier circuit component, an analog-digital conversion circuit component, a microprocessor and an output driver sequentially connected. The audio wire cluster is connected to the input end of the sampling amplifier circuit component. The LED marquee light wires are connected to the output driver. The acousto-optic audio signal cable is simple in structure, convenient to operate, dynamic, fashionable and capable of synchronously flickering light during tone and rhythm changes of instrumental performances and speeches.

In the process of mounting a joint terminal (5) into a first terminal accommodating portion (16) of a housing (15), tab terminals (6) of the joint terminal (5) move forward along tab entrance paths (26) formed in the housing (15). The tab entrance path (26) is formed with a cam portion (27) spiral about an axis thereof. As the tab terminal (6) moves forward in the tab entrance path (26), a follower portion (8) formed at an intermediate position of the tab terminal (6) is guided by the cam portion (27). Thus, the tab terminal (6) is twisted about an axis. In this way, resilient contact pieces (14) of female terminals (9A, 9B) face the tab terminals (6) in a plate surface direction of the tab terminals (6) and are connected to the tab terminals (6).

A cable which comprises first, second, third and fourth twisted pairs, and each of the first, the second, the third and the fourth twisted pairs comprising first and second insulated conductors. Each one of the first, the second, the third and the fourth twisted pairs has a different lay length from one another with the first of the twisted pairs having a shortest lay length and the fourth of the twisted pairs having a longest lay length. The first and second insulated conductors of at least the fourth twisted pair, with the longest lay length, are bound together with one another by a wrap which prevents the first and second insulated conductors, of the fourth twisted pair, from becoming separated from one another during subsequent manufacture, handing and/or installation of the cable.

A cable which comprises first, second, third and fourth twisted pairs, and each of the first, the second, the third and the fourth twisted pairs comprising first and second insulated conductors. Each one of the first, the second, the third and the fourth twisted pairs has a different lay length from one another with the first of the twisted pairs having a shortest lay length and the fourth of the twisted pairs having a longest lay length. The first and second insulated conductors of at least the fourth twisted pair, with the longest lay length, are bound together with one another by a wrap which prevents the first and second insulated conductors, of the fourth twisted pair, from becoming separated from one another during subsequent manufacture, handing and/or installation of the cable.