Primary and secondary windings and iron core are insulated by epoxy resin. It has a good ability of insulation and moisture proof.
二次绕组和铁芯均浇注在环氧树脂内,绝缘性能优良,耐潮湿。
2
The primary improvement is that it USES a resin container that lasts for "months and not weeks" because it USES a film to separate the resin from the base instead of delicate silicone.