The way leading to occurrence of drop casualty accident from hanger is discovered and some preventive measures are put forward.
找出了导致吊架坠落伤亡事故发生的途径,并提出了一些预防措施。
The way leading to occurrence of drop casualty accident from hanger is discovered and some preventive measures are put forward.
找出了导致吊架坠落伤亡事故发生的途径,并提出了一些预防措施。
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