产品说明：
.产品型号：DC-513
·尺寸：179*43*70mm
·孔位尺寸：162*22mm
·门重范围：45~75kg
·功能：双速可调
·适用场合：防盗门、铁门
·使用德国优质密封圈，漏油低于千分之一
·内置德国优质抗燃防冻油，在-40度以上正常工作
Specifications:
.Dual valve, closing and latching speed controlled by two separate regulating valves
.Standard packing for regular and top jamb installation
.Parallel arm installation optional
.Heavy duty rack and pinion
.High strength cast aluminium body
.Size:198*45*72mm(L x W x H)
.Dimension of Installation:19*190mm(W x H)
.Weight of Door:45-75kg
.The Maximum Open Angle:180-20degree