There are design variants with detachable and non-detachable inner rings as well as sealed and unsealed designs.
可拆卸的存在和非可拆卸内圈设计以及密封和非密封设计的变种。
Complex terrain of network design, dust source points sealed design and the choice of devices, mobile sources dust-dust control and grass control are the key link.
复杂地形的管网设计，尘源点的密封装置的设计和选用，移动尘源的粉尘扩散控制以及二次扬尘的控制是整个工程中的重点和难点。
This model of hydraulic hinge is with the sealed design. it has passed strict 50,000 open-close test and 48hours salt spray test. it has been brass plated in order to avoid to go rusting.
本款液压铰链采用封口式款型，严格通过5万次开关测试和48小时盐雾测试，表面多增加一层镀铜处理，防止生锈和腐蚀。
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