... concentric gas lift valve 同心气举阀 concentric groove 同心纹 concentric insulated tubing 同心保温油管 ...
基于56个网页-相关网页
... concentric circles 同心圆 concentric groove 闭纹 concentric cable 同轴电缆 ...
基于1个网页-相关网页
... 槽 trough; manger 闭槽 concentric groove 半闭槽 half closed slot ...
基于1个网页-相关网页
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