- Thefunctionofclosedsuctionmotormaketheresidualwaterisleakproof,relaxedandhumanization.Technicalchallengesremain,includingintegratingaleakproofbackupbatteryintothedeviceandminiaturisingtheFREE-D’scontrolelectronics.Theleakprooftreatment:makesurethaty...
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