Before the successful development of this system, the coilspacing 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, coilspacing and moisture content of soil, etc.
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.