tapped through hole
... tapped T-head 螺纹T字头 tapped through hole 螺纹贯穿孔 tapped transformer 抽头变压器 ...
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凸耳阀门可规定采用螺纹孔螺栓连接或贯穿孔螺栓连接。
Lug valves can be specified with threaded or thru-hole bolting.
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