coal dust造句
31 Full-close management is realized in coal coke site to avoid the floating pollution of coal dust.
32 Black lung is a coal miner's disease caused by the frequent inhaling of coal dust.
33 It's suffused with a thick smog that's a perpetual sulphur-yellow, and suffocated by motes of coal dust suspended in the breeze.
34 The relations between the maximum explosion pressure, the maximum quantity of draw-off heat and coal dust concentration, methane concentration were calculated.
35 OBJECTIVE:To prevent and treat contact dermatitis for contacting chemical substance harmful to workers health such as coal dust, tar, anthrone and naphthol, etc.
36 This hoisting gear is used for hoisting or transporting at the place of coal shaft with explosive mixture of gas or coal dust.
37 This series distribution device is applicable for coal mine with firedamp or coal dust in the ambient.
38 FS powder can be used as a substitute for coal dust to prevent metal penetration.
39 The physical mechanics property of the slurry of coal dust is tested, and the actual volume of it in the separated strata space is calculated in condition that it has been compressed.
40 Coal miners far and away have the highest mortality rate from pneumoconiosis, or black lung disease, which is cause by long-term exposure to coal dust.
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