The pulse frequency was not printed, it is estimated from the size of the coils and transformer that the frequency doesn't exceed 50 Mhz. Don't depend on this being fact, it's just a educated guess.
This is one of the factors that governs the size of the transformer.
这是变压器的一个因素支配的大小。
3
The bacteria planococcus sp . , pseudomonas sp . and xanthomonas sp . obtained from the dielectric oil of a scrapped large - sizetransformer were studied on their states and metabolism.