問題詳情
53. 當新氣瓶與氣瓶頭組合時，以下何者正確：
(A)氣瓶螺紋上套上氣密圈
(B)用鐵弗龍膠帶密纏一層
(C)用鐵弗龍膠帶密纏雙層
(D)有效地使用低壓空氣使鐵弗龍膠帶緊纏氣瓶頭螺。
(A)氣瓶螺紋上套上氣密圈
(B)用鐵弗龍膠帶密纏一層
(C)用鐵弗龍膠帶密纏雙層
(D)有效地使用低壓空氣使鐵弗龍膠帶緊纏氣瓶頭螺。
參考答案
答案：A
難度：適中0.5
統計：A(1),B(0),C(1),D(0),E(0)
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