21. 船舶液櫃之液面指示器常用之種類不包含下列何者？ (A) 紅外線式液面計 (B) 氣壓式液面計 (C) 浮子式液面計 (D) 電極式液面計

8. One kind of tools which are in common use for daily maintenance works on the ship is a simple tool designed to insert and tighten, or to loosen and remove, screws. The tool comprises an approximately cylindrical handle to be held by the worker, and an axial shaft fixed to the handle, the tip of which is shaped to fit a particular type of screw. The handle and shaft allow the tool to apply torque. What tool is above description? (A) Hammer (B) Screwdriver (C) Pliers (D) Drill

21. 船舶液櫃之液面指示器常用之種類不包含下列何者？
(A) 紅外線式液面計
(B) 氣壓式液面計
(C) 浮子式液面計
(D) 電極式液面計

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