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Sentence

塩えん化かエチルはかつて冷れい媒ばいとして使つかわれていた。

Span Details

塩えん化かエチル

かつて

once; before; formerly; ever

adverb, no-adjective

冷れい媒ばい

refrigerant; coolant

as; in the role of

use; make use of; employ

-> 使うgodan verb

passive, potential, or respect auxiliary

-> れる/られるgrammar

ongoing or resultant state

-> ているgrammar

past tense or completed action