Rainbow nine Industry Corporation since 2015, adhere to market-oriented, "the integration of resources, intensive development, market diversification, intelligent manufacturing, high-end products," as the starting point. Insist on doing quality, integrity to do, we do focus on doing innovation. To this end, the company developed together with relevant scientific research departments to produce a new generation of integrated construction elevator inverter. It uses advanced technologies to upgrade systems inverter device, the weight limiter device is integrated into one. Frequency device is mounted inside the cage, making the machine more elegant in appearance, and beautiful.