Hana ʻia ka pepa kalapona kalapona i nā mea kalapona graphite kiʻekiʻe, i hoʻohui ʻia me nā mea hoʻohuihui kūlohelohe kūʻokoʻa, hoʻomaʻemaʻe ʻia e ka hana kiʻekiʻe-pressure, vacuum impregnation, a me ka mālama wela wela. Loaʻa iā ia ka ʻakika kupaianaha a me ke kūpaʻa wela a he hopena phosphoric acid i ka ʻoihana kemika. ʻO nā mea lining kūpono no nā pahu, nā pahu mālama waika phosphoric a me nā mea hana ʻē aʻe. ʻO ka graphite ka mea maka o ka pepa graphite,...
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