wheel casing 齿轮箱 ; 轮罩
fly wheel casing 飞轮罩 ; 飞轮壳
cog wheel casing 镶齿轮套 ; 嵌齿轮套
wheel motor casing 车轮马达壳体
cog-wheel casing 嵌齿轮套
A line wheel locking device is arranged between the line wheel casing and the line wheel.
线轮壳与线轮之间设有线轮锁定装置。
The dog chain, the movable end of which is connected with a dog ring by a fastener is connected with the line wheel by a line wheel casing mouth and wound.
活动端用扣具与狗项圈相连的狗链通过线轮壳口与线轮相连并卷绕起来；
An electric pencil sharpener USES a toy motor as power and is composed of conic casing with tubular ends, multi-edge cutter for wooden part and a small abrasive wheel for lead core.
一种电动卷笔器，玩具电动机经齿轮减速装置与一中部为锥形，两端为空心圆筒的多刀刃卷笔刀筒机械连接。小砂轮套装在玩具电动机轴上。
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