常見例句雙語例句Reserves of coal, coal bed methane gas, bauxite, refractory clay, potassic rock and so on rank first in China.煤、煤層氣、鋁土礦、耐火粘土、鐵礬土、含鉀巖石等儲(chǔ)量居全國首位；http://www.chazidian.comPhosphoric acid technical grade can be used to produce variety of phosphate, refractory clay and rust –proof coating;工業(yè)級磷酸用作生產(chǎn)各種磷酸鹽， 磷酸耐火泥， 涂料工業(yè)用作 金屬防銹漆；China has begun to restrict the mining and production of refractory clay and fluorite over concerns about reserves decreasing and environmental pollution, the central government's website said Sunday.據(jù)中國政府網(wǎng)3日消息，由于資源儲(chǔ)量快速下降和環(huán)境污染嚴(yán)重等原因，國家要求開始對耐火粘土和螢石的開采和生產(chǎn)進(jìn)行控制。www.chinadaily.com.cn 返回 refractory clay