卡西尼卵形线 Cassini oval ; [数] Cassini's oval
外形线 outline ; [数] visible outline ; visible line ; object line
筒形线圈 solenoid ; coil cylindrical
环形线路 [交] [通信] loop line ; Loop Trail
环形线圈 [电] toroidal coil ; [电] toroid ; doughnut coil ; encircling coil
心形线 cardioid ; unilish
旋毛形线虫 Trichinella spiralis ; Trichinella
塑料J形线封装 SOJ
折形线圈 Accordion coil
环形线圈间隙 annular coil clearance
特别说明：每条U形线由4人组成，2男2女进行操作。
晶体粒度是获得和保持形线公差和光洁度的关键因素，它也影响到磨轮的磨削能力。
Grain size is the key factor in attaining and maintaining form tolerance and finish requirements, as well as effecting aggressiveness of the wheel.
当此槽形线底部与中心圆柱的轴线间的距离趋于无限大时，我们即得到人的所熟知的两平板间具有中心内导体的传输线的结果。
When the distance between the axis of the inner conductor and the bottom of the trough tends to infinity, the results obtained in this paper go into that of the well-known slab line.
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