40BS12 1/2规格参数
相关型号
40BS12 3/4 40BS12 5/8 40BS12 7/8 40BS12HT 1 40BS12HT 1/2 40BS12HT 3/4 40BS12HT 5/8 40BS12HT 7/8 40BS13 1 40BS13 1/2