Flux cored wires for gas shielded and self-shielded metal arc welding of mild steel, high strength steel and low temperature service steel是什么意思_Flux cored wires for gas shielded and self-shielded metal arc welding of mild steel, high strength steel and low temperature service steel在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句