handle for valve stem 中文意思是什麼
handle for valve stem
解釋
閥桿手柄-
For the larger ball valves, as well as all butterfly valves, the appropriate butterfly valve handle and index plate are supplied for manual operation of the stem extensions
對于用在所有球閥上的閥桿加長件,應該採用29240018齒輪操作機構和29241014驅動套管。
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