Iburu bọọlụ nchara nwere ọtụtụ ọkwa. Dabere na ndepụta akara na ọkwa mba GB / T308-2002, e kewara ha na G5, G10, G16, G28, G40, G60, G100, G200, G500, G1000, wdg. G bụ leta izizi nke ọkwa na Bekee , na ọnụ ọgụgụ ndị na-esonụ nwere ọkwa dị iche iche. Onye pere mpe ...
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