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| roughness parameter (поверхности) | |||
| roughness factor | |||
| roughness parameter; Ra (в русской практике – Ra : Abbreviation for "arithmetic average roughness height" – the measure of the roughness of a surface expressed in microinches. The higher the number, the rougher the surface. Used to designated the desired surface finish for end flange raised faces. paderin) | |||
| параметр шероховатости: 3 phrases in 2 subjects |
| General | 1 |
| Technology | 2 |