back ward welding的意思|示意
美 / /
英 / /
反向焊接
back ward welding的网络常见释义
反手焊接 ... back step welding反手焊接 back ward welding反手焊接 back welding底焊; 退焊法 ...
后退焊 ... 后退二 half astern 后退焊 back hand welding; back ward welding; backward welding 后退滑 retrogressive slide ...