A system and method for displaying surf training instructional information is used to improve a user's pop-up, as it relates to popping up on a surfboard, and improving one's surf fitness. The visual illustrations indicates the position of a surfer's hands, their body when lying on their surfboard and/or where their feet should land when they pop-up into their surfing stance on a surfboard, which can engraved, drawn or painted onto a surface of any type. The system and method also has visual instructional guidelines for performing exercises and stretches that can be done to improve a user's surf strength, balance, flexibility and endurance. By using this system and method a user will improve their pop-up (jump) and overall surf fitness in order to become a better surfer.

A motion measurement method includes a motion measurement point defining step, a reference ball socket positioning step, a measuring bar installing step and a measuring step. A first reference point and a second reference point are disposed on the worktable. A motion measurement point is disposed on a machine spindle. A first measuring bar is installed between the first reference point and the motion measurement point. A second measuring bar is installed between the second reference point and the motion measurement point. The motion measurement point is moved relative to the first reference point and the second reference point. The motion trajectory and the motion trajectory errors of the machine can be calculated from a first measuring distance and a second measuring distance obtained by the first and the second measuring bar, in association with a first reference distance between the first and the second reference point.

A high-stability step gauge and a preparation method therefor, where the step gauge has a base body, the base body includes a pillar carrier disposed along a coordinate direction, gauge block mounting blocks are distributed on the pillar carrier, and gauge pieces are fixedly mounted on the gauge block mounting blocks. The high-stability step gauge has good accuracy and stability, a small size, and strong functions. Deformation errors caused by the step gauge due to factors such as a weight of the base body are effectively and prominently reduced by means of reasonable combination of the base body and the gauge block mounting blocks. The preparation method thereof provides a stable length direction low deformation performance by using a cylindrical rigid support as the base body. The sleeved gauge block mounting blocks have high fixed mounting stability, and positioning and assembly of the gauge pieces are accurate.

A system and method for displaying surf training instructional information is used to improve a user's pop-up, as it relates to popping up on a surfboard, and improving one's surf fitness. The visual illustrations indicates the position of a surfer's hands, their body when lying on their surfboard and/or where their feet should land when they pop-up into their surfing stance on a surfboard, which can engraved, drawn or painted onto a surface of any type. The system and method also has visual instructional guidelines for performing exercises and stretches that can be done to improve a user's surf strength, balance, flexibility and endurance. By using this system and method a user will improve their pop-up (jump) and overall surf fitness in order to become a better surfer.

A high-stability step gauge and a preparation method therefor, where the step gauge has a base body, the base body includes a pillar carrier disposed along a coordinate direction, gauge block mounting blocks are distributed on the pillar carrier, and gauge pieces are fixedly mounted on the gauge block mounting blocks. The high-stability step gauge has good accuracy and stability, a small size, and strong functions. Deformation errors caused by the step gauge due to factors such as a weight of the base body are effectively and prominently reduced by means of reasonable combination of the base body and the gauge block mounting blocks. The preparation method thereof provides a stable length direction low deformation performance by using a cylindrical rigid support as the base body. The sleeved gauge block mounting blocks have high fixed mounting stability, and positioning and assembly of the gauge pieces are accurate.

A vehicle measurement apparatus, includes a base module, a column module, and a crossbeam module, the column module being mounted on the base module, and the crossbeam module comprising a crossbeam, an adjustment mechanism and a fine-adjustment mechanism, wherein one end of the fine-adjustment mechanism is mounted on the column module, and the other end of the fine-adjustment mechanism is mounted on the adjustment mechanism; the crossbeam is mounted on the adjustment mechanism; the adjustment mechanism is configured to adjust the position of the crossbeam relative to the column module; and the fine-adjustment mechanism is configured to adjust the position of the adjustment mechanism relative to the column module. With the above structure, during the adjustment process, a user can adjust the position of the crossbeam only by means of the fine-adjustment mechanism and the adjustment mechanism.

An apparatus for documenting stair dimensional uniformity which measures variations in riser heights and tread depths in a constructed stair. Improved rule stops are attachable to a carpenter's square at positions corresponding to required step dimensions. In operation, the apparatus is self-standing while being supported by and spanning between the upper and lower nosing of a step. A tread variance indicator and riser variance indicator display the amount of variance from required dimensions. A stable nosing locator identifies the portion of a rounded or beveled nosing that may be included in a tread depth measurement. The variance indicators and stable nosing locator are positioned to facilitate photographic documentation.