dummy coupling

Aquinas... ... dummy copy 代用复本， 具有内容摘要的样本 dummy coupling 空联节， 堵塞， 旋塞 dummy coupling chain 防 …

http://www.ptsgi.co... ... "软管连结器"," Hose coupling" "软管连结器哑接头"," Dummy coupling" "软管短管头"," Hose nipple" ...