Test the condition of all the welding parts especially rope-break safety instrument and welding seam of suspension coop safety inserting block.
检查各焊接部位的情况特别是断绳安全装置和吊笼安全插块部位的焊缝情况。
2
Plane block production line is an important and indispensable facility in modern shipbuilding industry which includes advanced assembly and welding equipment and advanced production processes.
平面分段流水线是现代造船不可缺少的一种重要生产设施，包含先进的装配、焊接设备及作业流程。
3
The engine block for DF 4C diesel locomotives uses cast welding structure.