In marketing, electricity is the dominant form of energy used. 電力是銷(xiāo)售過(guò)程中所用能量的一種主要形式。
Several methods of strengthening quality management of coal sale process in Kailuan Group Corporation Ltd. 介紹了開(kāi)灤集團在煤炭銷(xiāo)售過(guò)程中加強質(zhì)量管理的一些方法。