washout plug
A small mudhole used for washing out a steam boiler, usually screwed into a taper thread, rather than being held by clamps.
The use of the French language.
Dated spelling of preelection.
The state of being gargoylish.
年次検査の前に、技師は蒸気ボイラーの汚泥を取り除くために、テーパーねじで取り付けられたボイラー洗浄用の小さな泥抜き口を外した。
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