不能持久的

Has good shear stability to ensure long-term use of non-rejection grease, outstanding low performance, can be maintained normal use under the condition of cold environment ,excellent performance rubber compatible, be able to maintain lasting performance and quality performance of brake cylinder.

具有良好的剪切安定性，确保长期使用中不甩脂；突出的低温性能，在极寒情况下能保持正常使用；优良的橡胶相容性能，能够保持制动缸橡胶皮碗的耐寒持久性能和质量性能。

DAE JIN FORTUNE" will innovate new technology in order that our brand" DSF can by known and accepted by the users all over the world and establish the undefeatable image and credit.

&大真鲍特&将不断创新技术，为使世界各方用户能认知和接受DSF产品，确立我们不败的信誉形象，我们将持久不懈的努力，朝着世界最优企业发展。

By comparing with the conventional method, the sparse numbering schema has some merits as follow: the values of start and end do not recomputed, when a new node is inserted, the updating efficiency of tree structure is improvement, and the XML documents are traversed only once, when the schema is constructed, this further decrease the cost of building tree, and the schema can provide a durable conference for index.

与传统方法相比，其优点在于：由于在插入新结点时不需要重新计算其结点的start和end值，树结构更新效率得到提高；树的创建只需遍历一次文档，进一步地节省了建树开销；此外，它还能为索引提供一个相对持久和稳定的参考。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐