Raws li PCB board reinforcement cov ntaub ntawv, nws yog feem ntau muab faib ua cov nram qab no hom: 1. Phenolic PCB daim ntawv substrate Vim hais tias hom ntawm PCB board yog tsim los ntawm cov ntawv pulp, ntoo pulp, thiab lwm yam., tej zaum nws yuav ua cardboard, V0 board, nplaim- retardant board thiab 94HB, thiab lwm yam. Nws lub ntsiab khub ...
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