A.1000mm B.9000mm C.1mm D.9mm
A.1.10 B.1.20 C.1.30 D.1.40
A.1孔 B.2孔 C.3孔 D.4孔
A.Ⅰ B.Ⅱ C.Ⅲ D.Ⅳ
A、4组 B、3组 C、9组
