粒度一般是向上遞減的.There is a general decrease in grain size upward.在不存在成本遞減的地方, 對(duì)國(guó)營(yíng)企業(yè)的存在是有爭(zhēng)論的.Where declining costs do not exist, the presence of state enterprise is controversial.影響遞減的主要因素是采油速度.The main influence factor of pro...