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腾讯网
27 天
电气焊操作不当有风险,莫让“星火”变“燎原”!
电气焊属于明火作业,焊点温度通常可达3600-6000℃,存在高温、高压、易燃易爆的危险。 火花飞溅 引燃可燃物 在焊接作业时有大量高温火花、焊渣 ...
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今日热点
Consumer inflation picks up
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Valadao wins reelection
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October deliveries plunge
‘I was not paid a dime’
Suspect waives jury trial
STD epidemic slows
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