订阅者可以不受限制的使用这个系统，而且也不用为每一条数据缴纳费用。
Subscribers gain unlimited use of the system with no per-record use fees.
基于Linux的嵌入式系统通常采用一个规模更小的内核和应用程序堆栈，这比提供的嵌入式设置更适合受限制的环境。
Linux-based embedded systems typically employ a smaller footprint kernel and application stack that is better for the constrained environment than an embedded setting provided.
这种新型调速阀尤其适用于液压系统集成块尺寸受限制的场合。
The new control valve Safety valves particularly suitable for hydraulic manifold block size limited occasions.
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