美国采购需求：中国液压闭门器，滑动门闭门器，自动调节闭门器，紧急推门锁，紧急出口装置，电动门磁力锁

I'm interested in sourcing door closers for our upcoming projects. Looking for models that ensure smooth, reliable operation and meet safety standards. Key features I'm particularly focused on include adjustable closing speed, hold-open functionality, and durability for high-traffic areas. Could you provide details on your product range, including pricing, minimum order quantities, and lead times? Additionally, any technical specs or installation guidelines would be appreciated. Looking forward to your prompt response so we can move forward quickly!