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1·Before the successful development of this system, the coil spacing in the magnetic field coil system was fixed and there are large magnetic gradients in almost all the environment;

迄今为止使用的磁场线圈间距全为固定式，而环境又几乎全有较大的磁场梯度。

2·Analyses the influence of some factors on the operation performance of inner coil, such as coil material, soil type, charging temperature, fluid flux, coil spacing and moisture content of soil, etc.

分析了盘管管材、土壤类型、蓄冷温度、流体的流量、盘管间距以及土壤含水率等因素对管束内层盘管运行特性的影响。

3·Compression springs are coil springs wound with spacing between the coils so that they can be compressed from their free length to a shorter operating length to store energy or provide a force.

压缩弹簧由线圈弹簧缠绕而成，线圈之间有空间，以便弹簧从自由长度压缩到最短的，工作长度储能或产生压力。