焊接配备
The present situation concerning the outfit and management of the reception facilities for chemical tank washings and some suggestions related thereto Code for construction and acceptance of welding works of on-site equipment and industrial pipeline
散化船洗舱水接收设施配备和管理的现状及建议现场设备、工业管道焊接工程施工及验收规范
纳米英语 · 双语新闻
纳米英语 · 双语娱乐资讯
纳米英语 · 商务口语