The aluminium pick up of stem in extrusion is one of the causes of inwall defects of the extruded aluminium alloy pipe.是什么意思_The aluminium pick up of stem in extrusion is one of the causes of inwall defects of the extruded aluminium alloy pipe.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句