Different on-site test methods are Compared, and it is shown that power frequency series resonant circuit is relatively simple and feasible, and is therefore preferable.
对不同现场试验方法的比较说明：工频串联谐振回路简单易行，是比较可取的；同时需对振荡操作波和超低频法等作进一步研究。
Design work has also built a system is very particular about the power divider, it has a lower frequency than traditional units in terms of series inductance values.
系统还内置一个设计做工都非常讲究的功率分频器，它有着相对传统而言更低的低频单元串联电感值。
Derived and solved the governing vibration equations of orthotropic membrane, and obtained the power series formula of nonlinear vibration frequency of rectangular membrane with four edges fixed.
得到了按矩形四边固支边界考虑时，膜材大挠度非线性振动频率的幂级数表达式。
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