loading and unloading operation

基本解释

Petroleum loading and unloading is a dangerous operation.
油品装卸作业是频繁进行的一种危险性操作。
Alternating stress can be seen on roof plates when the tank is under loading and unloading operation with a pressure change of oil vapour in it.
当油罐吸油和排油时，罐内气体压力发生变化，致使顶板产生交变应力。
The paper deals with the characteristics of refinery products handling and the present status of automation in the way of loading and unloading operation, storage and shipping.
本文介绍了炼厂油品储运的特点及油品的进出厂装卸作业、储存和输送等方面的自动化现状。