词组、短语、俚语及习惯用语• round about
周围,向相反方向,迂回地,大约。• round and round
旋转不息地。• round and spline broach
圆孔花键复合拉刀。• round angle
[数]周角。• round arc point mesh gear
点啮合圆弧齿轮。• round arch
半圆拱。• round arris edge
(玻璃)圆棱边。• round bar spiral spring
圆条盘簧。• round bearing
转动件轴承。• round belting
圆带装置。