Mechanical strength of pipe coating and its thickness of standard paintcoat must be ensured in the pipe coating production lines,two pipes in the course of coating must be flexibly jointed.
道
敷生产线要保证
件
敷层的机械强
及标准
层的
,
根
子在
敷过程中要保证柔性顶接,连接处不能有缝隙。