螺丝铝合金TRUSS架400mmx400mm BN-GB4040

Specifications:
BN-GB4040-100 = 1M
BN-GB4040-200 = 2M
BN-GB4040-300 = 3M
BN-GB4040-400 = 4M
BN-GB4040: 400x400mm box truss, main tube 50x3mm
BN-GB4040 allowable loading