项目开发流程的各个环节是相互关联的，生产决定销售，销售同时制约着产品生产。
The item develops process of each link is a connection mutually, producing decision sale, selling in the meantime a check and supervision a product production.
飞锯机是管材连续自动生产线上的关键设备，它不仅控制管材的定尺切断精度，同时制约着生产线的生产速度和切口质量。
Flying saw is the important equipment for pipe flow production line. It not only controls the accuracy of pipe length, but also restricts the production speed and cut surface quality.
同时，标准也不是能解决所有的事情——像其他技术一样，RFID也受到物理学的制约。
And standards do not solve everything: RFID, like any other technology, is subject to the laws of physics.
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