Mineral exploration made important progress in .coal, uranium, iron, gold, silver, copper, nickel, zinc, lead, antimony, tungsten, molybdenum, vanadium, kainite and characteristic non-metal.
Columbia University researchers using this machine found the vapor has toxic metals like chromium, nickel, zinc and lead and as we know, there's no safe level of lead.
查在煤、铀、铁、金、银、铜、镍、铅、锌、锑、钨、钼、
、钾盐及特色非金属矿
进展。
了气雾中含有有毒金属，例如铬、镍、锌、铅，而
道，只要含铅就是危险的。
