Special postal articles refer to postal date-marks, postal tongs FOR leadsealing and postal bags.
指邮政日戳、邮政夹钳和邮袋。
2
special postal articles: referring to postal date-marks, postal tongs for leadsealing and postal bags.
邮政专用品：指邮政日戳、邮政夹钳和邮袋。
3
In the lack of condition for the pressure test, it is not allowed to remove the leadsealing of the reversing valve to adjust the pressure regulating button.