精品一区二区AV天堂色综合|久久影音第一页午夜|亚洲成AV人久久|无人区乱码一区二区三区

1, the structure is compact, the starting torque is big, the thrust big---12 meters wide, the single fan 600 kg gate easy switch.

2, easy installation---general electrician without experience can easily according to the manual installation.

3, beautiful shape, simple structure, full-featured, economical and practical---remote control switch door, stop, overheat overload timeout protection.

4, the working method is reasonable, the failure rate is very low--so far domestic tens of thousands of users, the rate of repair is very low.

5, electric or manual, all by the user----when the power failure, can be used for special clutch key switch to manual state.