The producing technology ofp - dichlorobenzene especially the catalysts are described in this thesis.本文介绍了国内外对二 氯苯 生产技术特别是催化剂方面的最新进展.The p dichlorobenzene and naphthalene in mothproofing agent was determined by infrared ...
我们把工作转包给了一家小型工程公司。We subcontracted the work to a small engineering firm.分公司承接转包(二包)工作时会得到优惠待遇.Subsidiary company get preferential treatment when it come to subcontract work.电气工作已转包给史密斯有限公司.The electrical work have been s...