Jiahuang is an enterprise combining R&D and manufacture as a whole, specializing in developing and producing various RV reducer, worm elevator, nrv-nmrv reducer, cycloidal reducer, opener, valve hoist, and UD planetary stepless gear.

https://www.jiahuangtech.com/product/nmrv/nmrv-nmrv-nmrv-product/nmrv-round-flange-machine.html