型号 规格 包装尺寸 KB301 20*1/2" 320 KB302 20*3/4" 200 KB303 25*1/2" 200 KB304 25*3/4" 200 KB305 32*1/2" 250 KB306 32*3/4" 200 KB307 32*1" 120 KB308 40*1 1/4" 60 KB309 50*1 1/2" 48 KB310 63*2" 24