A.10 B.12 C.16 D.24
A.25m²3m1.9m B.30m²2.5m1.9m C.25m²2.5m1.9m D.30m²3m2.1m
A.截面、型號、材質(zhì) B.長度、型號、規(guī)格 C.規(guī)格、型號、截面 D.長度、截面、材質(zhì)