A sand source selecting structure for a sandblasting gun has a main body; a channel provided in the main body, for passing a high pressure gas; at least two sub-channels provided in the main body respectively connected to the channel; a sandbox mounted on the main body connected to the channel through each of the sub-channels; at least one supply tube; a first control valve installed in the main body, for connecting the sandbox and at least one of the sub-channels of the channel; and a second control valve installed in the main body, for connecting the channel and another sub-channel of the supply tube. Therefore, the combination of the first control valve and the second valve provides a selecting structure, which can offer different sand supply sources.

The present invention aims to provide an interlayer film for a laminated glass having recesses in the shape of engraved lines on both surfaces to exhibit excellent deaeration properties in production of a laminated glass and suppressing formation of a moire pattern when unwound from a rolled body thereof. The present invention also aims to provide a laminated glass including the interlayer film for a laminated glass, a method for producing an embossing roll suitably used for production of the interlayer film for a laminated glass, and a method for producing the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses on both surfaces, the recesses each having a groove shape with a continuous bottom and being regularly adjacent and parallel to each other, the interlayer film having a glossiness on a surface with the large number of recesses measured in conformity with JIS Z 8741-1997 of higher than 3% or a haze value measured in conformity with JIS K 7105-1981 of 87% or lower.

The present invention aims to provide an interlayer film for a laminated glass having recesses in the shape of engraved lines on both surfaces to exhibit excellent deaeration properties in production of a laminated glass and suppressing formation of a moire pattern when unwound from a rolled body thereof. The present invention also aims to provide a laminated glass including the interlayer film for a laminated glass, a method for producing an embossing roll suitably used for production of the interlayer film for a laminated glass, and a method for producing the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses on both surfaces, the recesses each having a groove shape with a continuous bottom and being regularly adjacent and parallel to each other, the interlayer film having a glossiness on a surface with the large number of recesses measured in conformity with JIS Z 8741-1997 of higher than 3% or a haze value measured in conformity with JIS K 7105-1981 of 87% or lower.

Provided is a process for blast cleaning comprising subjecting a work surface to a blast stream, wherein the work surface is metal that is contaminated with one or more radioactive moiety, wherein the blast stream comprises water and one or more resin particles.

The present disclosure relates to a shot used for blast processing, the shot being made of an iron-based alloy containing C: 0.20 to 0.50% by mass, Si: 0.50 to 1.10% by mass, and Mn: 0.50 to 1.15% by mass as additive elements, in which a mass ratio of C to Si is 0.30 to 0.75, a mass ratio of C to Mn is 0.30 to 0.75, and a mass ratio of Si to Mn is 0.70 to 1.60, and a Vickers hardness of the shot is HV 400 to 800.

The present disclosure relates to a shot used for blast processing, the shot being made of an iron-based alloy containing C: 0.20 to 0.50% by mass, Si: 0.50 to 1.10% by mass, and Mn: 0.50 to 1.15% by mass as additive elements, in which a mass ratio of C to Si is 0.30 to 0.75, a mass ratio of C to Mn is 0.30 to 0.75, and a mass ratio of Si to Mn is 0.70 to 1.60, and a Vickers hardness of the shot is HV 400 to 800.

A particle blast apparatus or system entrains blast media particles from a particle source into a transport fluid which already has blast media particles entrained therein. The system may have, prior thereto, entrained blast media particles into the transport fluid which at that time did not already have blast media particles entrained therein. The particle types may be dissimilar, such as dry ice particles and abrasive media particles.

The invention relates to an apparatus for producing, in particular high-strength, CO.sub.2 pellets from CO.sub.2 snow, in particular for a cleaning appliance for blasting surfaces to be treated with a mixed stream of a pressurized gas and CO.sub.2 pellets, wherein the apparatus comprises a compressing device for compressing CO.sub.2 snow to form CO.sub.2 pellets and a delivery device for delivering the CO.sub.2 pellets into a pressurized gas stream, wherein the apparatus comprises a fluid mechanical transfer device for conveying CO.sub.2 pellets from the compressing device to the delivery device and wherein the transfer device is arranged or formed between the compressing device and the delivery device.

Furthermore, an improved cleaning appliance and an improved method for producing CO.sub.2 pellets from CO.sub.2 snow are proposed.

The invention relates to an apparatus for producing, in particular high-strength, CO.sub.2 pellets from CO.sub.2 snow, in particular for a cleaning appliance for blasting surfaces to be treated with a mixed stream of a pressurized gas and CO.sub.2 pellets, wherein the apparatus comprises a compressing device for compressing CO.sub.2 snow to form CO.sub.2 pellets and a delivery device for delivering the CO.sub.2 pellets into a pressurized gas stream, wherein the apparatus comprises a fluid mechanical transfer device for conveying CO.sub.2 pellets from the compressing device to the delivery device and wherein the transfer device is arranged or formed between the compressing device and the delivery device.

Furthermore, an improved cleaning appliance and an improved method for producing CO.sub.2 pellets from CO.sub.2 snow are proposed.

The invention relates to a method for surface treatment of a biocompatible metal material, such as an implant, which comprises the following consecutive steps: i) abrasive mechanical treatment of the surface of said material using abrasive calcium phosphate grains, such as a mixture of hydroxyapatite and tricalcium phosphate; ii) acid treatment by hot dipping of said material in a bath comprising sulphuric acid and hydrochloric acid, followed by at least one rinse with demineralised water; iii) sodic treatment by hot dipping of said material in a soda bath followed by at least one rinse with demineralised water and drying in hot air. The implant thus treated has a surface with increased roughness with a triple level of porosity (macro-, micro- and nano-porosity) as well as improved hydrophilic properties. The method can be used for implants made of titanium alloys, such as the TA6V ELI alloy.