Combing trade, industry and technology as a whole, Hangzhou Jiacheng Machinery Co.,Ltd (hereinafter called Jiacheng Machinery) is a large-size enterprise specialized in producing worm redactors. It is devoted to provide special, efficient and humanist transmission solution. Its leading products are four series of gear redactors, WP series, NMRV series worm redactors and SWL series worm screw elevators, among which the sales volume of WP series worm redactors ranks the first in the whole country for successive three years.