Lus piav qhia luv luv:

Cov khoom siv rwb thaiv tsev rau roj immersed transformers:
1) Laminated ntoo, pas nrig thiab machining qhov chaw
2) Transformer board thiab rwb thaiv tsev cov khoom
3) corrugated cardboard, clack bands los yog txias roj channel
4) Cov hlua hluav taws xob dawb, E-iav siv, cov hlua khi
5) Pob zeb diamond dotted ntawv, pre-impregnated ntawv, cable ntawv
6) Phenolic ntawv raj, ntawv raj thiab crepe ntawv raj
7) Amorphous skeleton phenolic rods & txiv ntseej