防爆管型号规格:BNG -1000×G1 1 /4'3211 /41000BNG -700×G1 1 /2'401 1 /2700BNG -1000×G1 1 /2'401 1 /21000BNG -700×G2'502700BNG -1000×G2'5021000BNG -700×G2 1 /2'702 1 /2700BNG -1000×G2 1 /2'702 1 /21000BNG -700×G3'803700BNG -1000×G3'8031000BNG -700×G4'1004700BNG -1000×G4'10041000
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