So the patent protection of business method cost more social cost and rising“generally inconvenient”more easily.
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However, this system is very flawed. Generally, the special PT is relatively large, expensive and inconvenient to install, especially in the high-voltage transmission lines.
然而，这种系统存在很大的缺陷，即专用PT一般体积比较大、价格昂贵并且安装不便，特别是高压输电线在正常运行时无法安装。
Normal person generally and healthily, don't tangibly understand the behavior condition of the advanced age or the body activity inconvenient;
一般健康正常的人，并不确切地瞭解高龄者或身体活动不方便者的行为状况；
The hydropower station generally lie in remote mountain area, the traffic is inconvenient, Worker's living environment is relatively bad.
水电厂一般都位于偏僻的山区，交通不便，职工生活环境较差。
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