A rail automatic block signal system based on the field bus technology is introduced, and its reliability design is explained specially.
介绍一种基于现场总线技术的铁路自动闭塞系统，并就其可靠性设计作了重点阐述。
It should be specially explained that all these analysis is predicated on the assumption that all of the state's macroeconomic policies on the rural collective enterprises is the same.
需要特别说明的是，本文所有分析的前提是假设国家的宏观政策对所有的乡村集体企业的影响是一样的。
Combined with author's practice on design of frame with specially shaped columns in middle-highrise buildings, the problems about design calculation and construction of the frame are explained.
结合作者在小高层建筑中采用异形柱框架结构的设计实践，简要阐述了异形柱框架设计计算、结构构造及施工等有关问题。
Structures of induction electric energy meter and electron electric energy meter are introduced in chapter two, and operation principles are specially explained in detail.
本文第二章介绍了感应式和电子式电能表的结构，说明了这两种电能表的计量原理。
Structures of induction electric energy meter and electron electric energy meter are introduced in chapter two, and operation principles are specially explained in detail.
本文第二章介绍了感应式和电子式电能表的结构，说明了这两种电能表的计量原理。
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