試題詳解

複選題
38. 有關 shear bolt 的敘述，下列何者錯誤？
(A)tighten the shear bolts A until the hex heads B twist off
(B)tighten the hex he ads B until the shear bolts A twist off
(C)loosen the shear bolts A until the hex heads B twist off
(D)loosen the hex heads B un til the shear bolts A twist off。