...
2025-08-14 20:11
551
...
2025-08-14 20:01
2598
...
2025-08-14 19:59
629
...
2025-08-14 19:38
2855
...
2025-08-14 19:35
1862
...
2025-08-14 19:28
779
...
2025-08-14 19:20
798
...
2025-08-14 19:08
2302
...
2025-08-14 19:05
1340
...
2025-08-14 18:13
1389
3. Seal types and numbering system
Carefully lift off the cover. If it sticks, gently tap it sideways with a soft-faced rawhide or nylon hammer, or with the heel of your hand.

The interaction of the integrated seals with the shaft follows the dynamics of the PTFE seals. Often an additional dust seal (rubber lip or felt strip) provides an effective barrier against contaminating particles.
A: with minor lip
silicone rubber is better than silica gel for fuel oil and mineral oil, but it is inferior to silica gel in
perfluoro rubber:
alternative basic materials for modern industry, especially high-tech fields.
Rubber type

different types of spark plugs.