The performance bonding system, one of the economic instruments in environment management, can serve as an important economic instrument in the management of mining area rehabilitation.

保证金制度(或称执行保证金制度)是环境管理的经济手段之一，为了完善我国现行矿区土地复垦制度，有必要探讨保证金制度在矿区土地复垦管理中的应用。

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PP staple fibers with better bonding performance and more soft, high speed spinning are made on the line imported. The characteristics of this fiber are discussed as follows.

在引进的生产线上开发生产了具有更高粘合性能，高柔软，高速纺的丙纶短纤维，并探讨了这种纤维的产品特性。

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So bonding performance of the interface and internal force translating mechanism between FRP and high strength concrete are crucial in FRP strengthening technology.

FRP与混凝土之间通过界面层传递内力，研究界面层的粘结性能和内力传递机理是FRP加固技术的关键。

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