loading and unloading operation

基本解釋

Petroleum loading and unloading is a dangerous operation.
油品裝卸作業(yè)是頻繁進(jìn)行的一種危險(xiǎn)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.
當(dāng)油罐吸油和排油時(shí)，罐內(nèi)氣體壓力發(fā)生變化，致使頂板產(chǎn)生交變應(yīng)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.
本文介紹了煉廠油品儲運(yùn)的特點(diǎn)及油品的進(jìn)出廠裝卸作業(yè)、儲存和輸送等方面的自動化現(xiàn)狀。