单项选择题
A.5~6倍 B.6~7倍 C.7~8倍 D.8~9倍
A.50mm~100mm B.80mm~150mm C.100mm~200mm D.100mm~300mm
A.交叉捆绑 B.八字形 C.整体捆绑 D.腰箍下压式