The resonant characteristics is calculated and analyzed in different backings.
并对不同背衬下的情况进行了计算并分析了谐振特性。
Rubber or plastics coated textile backings. determination of the flexibility. pendulum method
背面涂有橡胶或塑料的织物底布。柔软性试验。摆锤方法
This person has influential backings.
此马来头大
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