Features: module type aluminum bow frame design, disassembly convenient; used automatic of design, operation using more convenient; bundle package of maximum size by bow frame decided, bow frame can according to user of needs custom; motor, and reducer, and cam, and crunch arm operation; packaged tight force excellence, fault less, maintenance convenient; packaged action soft, durable sex excellence, packaged function perfect; packaged ended hòu motor immediately stop, province electric practical.