BCD型(HB型)只是防爆钢丝绳电动葫芦的一种型号。并不代表防爆级别和防爆类别。BCD型是隔爆型电动葫芦，防爆等级分BT4和CT4，CT4比BT4的防爆级别要高，一般用于氢气、天燃气等易燃易爆气体的防爆。

BCD type (HB type) is only one type of explosion-proof wire rope electric hoist. It does not represent explosion-proof level and category. BCD type is explosion-proof electric hoist. Its explosion-proof grade is yinchuan.89ix.comzhengzhou.89ix.comjinan.89ix.comtaiyuan.89ix.comchangsha.89ix.comnanjing.89ix.c

omBT4 and CT4. CT4 is higher than BT4 in explosion-proof grade. It is generally used for explosion-proof of of flammable and explosive gases such as hydrogen and natural gas.

粉尘防爆是另一种防爆类别。也有专业的粉尘防爆生产许可证证书。但这种在国内很少见。也可以根据实际粉尘情况，选择合适的防爆钢丝绳电动葫芦。
Dust explosion-proof is another type of explosion-proof. There are also professional dust explosion-proof production license certificates. But this is rare in China. According to the actual dust situation, the appropriate explosion-proof wire rope electric hoist can also be selected.