| 摘要 |
1279581 Escape shoots LE JOINT FRANCAISE 15 Jan 1971 [18 March 1971 4 Nov 1971] 2184/71 Heading B7J [Also in Division B8] To reduce friction, an escape shoot provided with ribs 2, Fig. 3, which run in the direction of sliding, has the upper surfaces thereof coated with a thermoplastic polymer having a very low coefficient of friction, e.g. polytetrafluoroethylene. Examples of other coating materials are given. |
