22. One kind of tools which are in common use for daily maintenance works on the ship is a
one-piece wrench with an enclosed opening that grips all the faces of a bolt or nut. The tool is
often double-ended with offset handles to improve access to the nut or bolt. What tool is above
description?
(A) Screwdriver
(B) Open-end spanner
(C) Adjustable spanner
(D) Ring spanner
阿摩線上測驗
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