First, the analyzes present status of impawning supervision business for domestic enterprises.首先分析了目前我国物流企业的质押监管业务的现状.First, this article analyzes the origination and definition of impawning supervision business.本文从物流企业的...
Welding is one of the important technologies in impellers " artifactitious . "焊接是 叶轮 加工的重要工艺之一.The welding conditions should always be neutral or slightly oxidizing.焊接气氛必须永远保持中性或微氧化.The welding is so smooth that you can ...