青云翻译

Divided into three sections, the internal use of porous rock wool plate silencer, the welding method for submerged arc welding, gas welding and stud welding.

Divided into three sections of manufacturing, internal fixed silencers rock wool perforated plate, method for submerged arc welding, gas shielded welding stud welding and welding.

Divides into three sections of manufactures, the interior uses the perforated plate fixed deafen crag cotton and kapok, the welding method for the submerged-arc welding, the shielded welding and the stud welds.

Sub-paragraph 3 for internal use, manufactured porous plate fixed noise-rock and cotton, and welding methods for submerged arc welding, gas shielded welding and lo Chu-welding.

Divided into three sections of manufacturing, internal fixed silencers rock wool perforated plate, method for submerged arc welding, gas shielded welding stud welding and welding.