14.高壓管接頭所使用之螺紋為:
(A)圓形螺紋
(B)方形螺紋
(C)直管螺紋
(D)錐形管螺紋
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統計: A(79), B(50), C(92), D(1452), E(0) #1527171
統計: A(79), B(50), C(92), D(1452), E(0) #1527171