pipeline control valve管道: pipeline; channel; tunnel; p ...操纵: operate; control; roll; stee ...阀: established house or power g ...操纵阀: astern maneuvering valve; control valve; operating valve; pilot valve; sentinel relief valve管道操作符: pipe operator下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:管道操纵阀，即可在微信中查询翻译
