Main products are as follows : hong ta shan , a si ma , hong mei , including soft packing and hard packing
2.
The basic structure and the seal principles of the hard packing were presented , and the formula of specific pressure was given
3.
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
4.
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
मोबाइल