(a) a roller placed so as to lessen the friction of anything passing over it; (b) see quot. 1888.
单词 | θ214509 |
释义 | society > occupation and work > equipment > machine > parts of machines > other parts > [noun] > parts for reducing friction > part of (2) friction-roller1793 (a) a roller placed so as to lessen the friction of anything passing over it; (b) see quot. 1888. ball bearing1904 A small, solid metal ball of the kind used in such bearings. |
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