hard packing meaning in English

硬垫

Main products are as follows : hong ta shan , a si ma , hong mei , including soft packing and hard packing
主要产品：红塔山、阿诗玛、红梅牌号，软硬包两种规格。
The basic structure and the seal principles of the hard packing were presented , and the formula of specific pressure was given
介绍了硬填料密封的基本结构及密封原理，给出了比压计算式。
In an investigation , the hard packing was used to isolate the seal oil from the process fluid for recovering the seal oil from the catalytic hot oil pump
在回收催化热油泵密封油的试验中，用硬填料作为密封油和介质的隔离装置。
I fetched the pig in , and took him back nearly to the table and hacked into his throat with the axe , and laid him down on the ground to bleed ; i say ground because it was ground - hard packed , and no boards
我把猪拖了进去，拖到了离桌子不远之处，一斧头砍进了猪的喉咙口，把它放在地上流血我这里说的是地上，因为这确实是地面上。是夯结实的地面，没有铺木板。