rock·shaft 
(rŏkshăft′)
(rŏkshăft′)n.
A shaft that oscillates or rocks upon its bearings but does not revolve.
| 单词 | rockshaft |
| 释义 | rock·shaft (rŏkshăft′)n. A shaft that oscillates or rocks upon its bearings but does not revolve. |
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