Hydraulictensioning also shares some of these problems and adds problems with field retrofit.
液压紧固的方法也会遇到一些这样的困难，并且还会带来现场改造的相关问题。
2
A brief description of the operating principle, features and application of automatic hydraulictensioning devise for belt conveyors is given, which is a guide to using them correctly in coal mine.
简要介绍自动液压张紧装置的工作原理、特点和适用场合，对煤矿正确使用自动液压张紧装置具有指导意义。
3
Second, , spiral tensioning or hydraulic tension belt conveyor slip.