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If you manufacture steel that is steel manufacture.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
賃金カットなんかしたら、製鋼所の工員達がストライキを起こすかもしれませんよ。
If you cut their wages, the steelworkers might go on strike.
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