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? Exquisite appearance design, all-aluminum alloy shell ? Overload protection to prevent motor overload ? The chain is made of carbon steel (or stainless steel) with anti-corrosion treatment, suitable for a long-term humid environment ? Itinerary and push-pull force can be customized according to customers' needs ? Test more than 30,000 cycles
link:https://www.heinda-cn.com/automatic-window-system/single-chain-window-opener.html