The cylinder and the front and rear end caps are fixed and sealed by fixed screws and rubberpacking rings.
缸筒与前、后端盖，用固定螺钉和橡胶密封圈固定且密封。
2
Auto parts, rubberpacking, medical rubber, o ring, key, rubber for civil use, industrial rubber and bottle stopper, etc.
汽车配件、橡胶迫紧、医疗用橡胶、O型环、按键、民用橡胶、工业橡胶、瓶塞等。
3
A new technology of synthesizing SP and SP-C with mineral (a kind of rubberpacking agents) as catalyst has been sought, and the optimum technology conditions has been selected.