Apply flux to outside of tube and inside of solder cup . surfaces to be joined must be completely covered . use flux sparingly 在管道外面和焊接端口内侧涂上焊剂。需要连接的表面必须完全覆盖焊剂。要节约使用焊剂。
2.
Apply flux to outside of tube and inside of solder cup . surfaces to be joined must be completely covered . use flux sparingly 在管道的外面和焊接罩的内部涂上焊剂,焊剂必须完全覆盖焊接表面。请有节制地使用焊剂。