Amapayipi ensimbi othungelwano oluqondile adinga ukusebenzisa umkhiqizo ukuze ahambisane nenqubo yokukhiqiza, okungukuthi, i-lubricant yengilazi, eyakhiqizwa nge-graphite ngaphambi kokusebenzisa i-lubricant yengilazi, ngoba ngaleso sikhathi kwakungekho mkhiqizo onjalo emakethe. Ngakho-ke, i-graphite ingasetshenziswa kuphela njenge-lubricant, kodwa ...
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