两个cover翻成什么好? This specification covers the requirements for the fabrication and testing of seamless mechanically bonded bimetallic tubes for urea service with an outer tube of stainless steel and an inner tube of zirconium. 本说明 包含 尿素 装置无缝机械连接双金属管,外部 不锈钢管 和内部锌管的安装和 测试 要求。 The bimetallic tubes for urea strippers are proprietary equipment covered worldwide by patents owned by Snamprogetti. 尿素气提塔双金属管是斯纳姆公司的专有设备,世界范围内所 涉及 的此种设备斯纳姆公司都对其拥有专利权。 这两句中都有cover,总是觉得翻不好,还请各位给些指点。 [ ]查看更多10个回答 . 3人已关注