型号
回转方向
最小单位
3:1–4
右
1M
3:1–4L
左
3:1–5
3:1–5L
3:10–4
10㎝
3:10–4L
3:10–5
3:10–5L
3:10–6
3:100–4
1㎝
3:100–4L
3:100–5
3:100–5L