A.操作架 B.拋籠架 C.工作臺(tái) D.籠骨
A.10~12cm B.12~14cm C.14~15cm D.15~20cm
A.1:0.5~1:0.8 B.1:0.8~1:1 C.1:1.5~1:2.0 D.1:1~1:1.5