可组装成三联体或二联体。其调压阀调压旋钮位置可锁定，防止了工作过程中的位置变动。
Assemble into a triad body or diad body. Its regulator knob in pressure regulating valve can be locked, to prevent the location changed in the process of working.
属于或构成在组织或机构内部的位置变动，这种变动是同级变动，例如在工资或责任上，以填补空缺的位置。
Of or constituting a change within an organization or a hierarchy to a position at a similar level, as in salary or responsibility, to the one being left.
由于移动通信用户位置经常变动的特点，定位服务的广阔市场前景是毋庸置疑的。
On account of the constant changing of location of mobile communication users, mobile location service will undoubtedly develop with a glorious perspective.
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