China si elu-nkenke oyi adọta tube, nke mbụ a na-eji ọtụtụ ebe na coal ụlọ ọrụ, na ugbu a ọ gbatịpụrụ na n'ichepụta engineering ụlọ ọrụ, mmanụ, cylinder, cylinder na piston mkpara. Ịse àgwà, arụmọrụ, na-abawanye elu, mmepụta na-abawanye, na ...
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