special postal articles: referring to postal date-marks, postal tongs for lead sealing and postal bags.

邮政专用品：指邮政日戳、邮政夹钳和邮袋。

youdao

Special postal articles refer to postal date-marks, postal tongs FOR lead sealing and postal bags.

指邮政日戳、邮政夹钳和邮袋。

youdao

Cable inner end must use steel nut cap. Lead sealing is required for the sealing between the cable inner head and metal sleeve, which has a good sealing property.

电缆内端头应使用钢制封帽，与金属套的密封必须采用铅封，密封性能良好。

youdao

Murray did a good job of consolidating his lead but was denied the satisfaction of sealing the win when Stakhovsky, rather strangely, felt he could not continue when just two points from defeat.

BBC: Murray edges through Dubai opener

Victor Obinna's first league goal of the season doubled the lead early in the second half, although they still had to survive a scare before sealing what was ultimately a comfortable win.

BBC: West Ham 3-1 Wigan