單項選擇題
A.80~140mm B.140~200mm C.200~260mm D.260~320mm
A.0.1°~0.2° B.0.01°~0.02° C.0.2°~0.3° D.0.02°~0.03°
A.地漏 B.閥門 C.法蘭 D.大便器
A.20mm B.30mm C.50mm D.60mm
A.1~3mm B.2~4mm C.5~8mm D.5~10mm
A.0.5m B.1m C.1.5m D.2m
A.0.5m B.0.7m C.1m D.1.5m
A.陶瓷管 B.鑄鐵管 C.鋼管 D.黑鐵管
A.0.01°~O.025° B.0.1°~0.25° C.0.02°~0.05° D.0.2°~O.5°
A.±10mm B.±20mm C.±30mm D.±40mm
A.連接 B.連通 C.關(guān)聯(lián) D.串聯(lián)