The product looks and burns like a regular cigarette.这种产品看起来和点燃后都与常见的香烟没什么两样。The company, New England Electric, burns coal to generate power.新英格兰电力公司用煤发电。He had burns that stretched from his neck to his hips.他从脖子到臀部均被烧伤。...
钎焊铜及铜合金 、 银、钼等金属.Brazing of copper, copper alloys, silver and molybdenum etc.黄铜和青铜是两种广泛使用的铜合金.Two widely used alloys of copper are brass and bronze.研究了ICP -AES 法测定铜合金中微量硅的最优化条件.The conditions for determination of Si in C...