erection welding

基本解釋

Piping erection work include: prefabrication, placing, aligning, welding and bolting.
管道安裝工作包括：預(yù)制加工、安置、對(duì)準(zhǔn)、焊接和連接。。
Piping erection work include: prefstomachric: placing: are directeding: welding and bolting.
管道安裝職業(yè)包括：預(yù)制加工、睡眠、對(duì)準(zhǔn)、焊接和維系。
Where exposed to view, the temporary filling used for erection to be neatly removed, damages to the base material to be repaired by welding and grinding.
對(duì)那些可見部分用于分段合攏的臨時(shí)填充應(yīng)整潔地將其去除，損壞的母材應(yīng)通過(guò)焊接和打磨進(jìn)行修復(fù)。