常見例句雙語例句When using fixed installations for melting bitumen at construction sites in cities and towns these fixtures should be of the sealed type.城鎮(zhèn)建築施工熔化瀝青使用固定熔化裝置時，應(yīng)儅採用密閉方式。www.yishentongwang.com.cn 返回 fixed bitumen