triple valve
(rail transport) In railway air braking systems, a valve that performs three functions.
(mineralogy) A monoclinic-prismatic dark reddish gray mineral containing bismuth, cadmium, indium, iron, lead, manganese, selenium, and sulfur.
A woman who receives or collects a toll.
plural of pain in the neck
技師は列車のブレーキが正しく作動するか確認するために、鉄道用空気ブレーキ装置の三機能弁を点検した。
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