Strict control of coal mines, metal and nonmetal mines, dangerous chemicals, fireworks, explosive dust and other high risk workplace operators.

严格控制煤矿、金属非金属矿山、危险化学品、烟花爆竹、涉爆粉尘等高风险作业场所操作人员数量。

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The course of metal explosive welding and its essence of metal physics was described.

简述了金属爆炸焊接的过程和它的金属物理学本质。

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The process of metal explosive welding and its essence of metal physics are introduced.

简述了金属爆炸焊接的过程和它的金属物理学本质。

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The authorities are now looking for anything that might have been part of the explosive devices - bits of metal or sharp objects that they might be able to trace back to its owner or owners.

BBC: Forensics investigators decode the Boston bombings

The longer-term secular bull trend for gold remains bullish, and there remains plenty of fodder on the horizon to help trigger another explosive up move in the yellow metal in the days and weeks ahead.

FORBES: Technical Trading: Gold Bulls Snap Back From Last Week's Decline

The rockets were like stacked metal cans stuffed with highly explosive propellant.

NPR: Challenger: Reporting a Disaster's Cold, Hard Facts