Purpose:Service leading brand, method leading value;
服务成就品牌，渠道决定价值；
If method register is invoked simultaneously by multiple threads, it could result in a race condition leading to an incorrect _set value.
如果方法register同时由多个线程调用，那么它会产生一个竞争状态，导致出现错误的_ set值。
Explaining this text method can used for the leading engineering practices, having the good fulfillment value.
说明本文方法可用于指导工程实践，具有较好的实践价值。
Because of the specific physical and bio-chemical method are used, the process and treatment cost are of domestic leading position, having sound promotion value and social interests.
采用物理及生化法，其工艺及处理成本居国内领先水平，具有很好的推广价值和社会效益。
Because of the specific physical and bio-chemical method are used, the process and treatment cost are of domestic leading position, having sound promotion value and social interests.
采用物理及生化法，其工艺及处理成本居国内领先水平，具有很好的推广价值和社会效益。
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