"45mm是几分管"...45mm是几分管
"管径45是几分管"...管径45是几分管
"47mm是几分管"...47mm是几分管
"45是多粗的管"...45是多粗的管
"40是几分管"...40是几分管
"46分管"...46分管
"45管是几寸"...45管是几寸
"45的管子是几寸的"...45的管子是几寸的
"45的管子dn"...45的管子dn
"42mm是几分管"...42mm是几分管