book was still in his left hand
book was still in his left hand
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book was still in his left hand

Entries from 2020-06-02 to 1 day

2020-06-02

在使用冷水機組前對冷卻設備進行檢查

環保空調冷水機組運行時,需要打開一定面積的門窗進行通風。如果門窗不夠,應安裝排氣扇,排風量應為環保空調廠總冷卻風量的80%。冷水機組環保空調主機支架需要采用鋼結構焊接,其結構要求支撐兩倍於全身重量和維修人員的重量。 你還在用普通的嗎?JNC 3合1 …

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book was still in his left hand book was still in his left hand

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