2) German lapis 德国青金石3) lazurspar(lazurstone);lapis laxuli 青金,青金石4) the Qingshiling tungsten-polymetallic deposit 青石岭钨多金属矿 例句>> 5) German youth 德国青年 例句>> 6) Qinyun-stone ore 青云石矿 1. On the basis of analyzing strength and layer-crack damage ...