Abstract: Discuss a technique of oil tube elevator,introduce the constrution,principle,and safety of the new oil tube elevator latcher,and analyse the economic benefit and the apply prospect of the oil tube elevator with the exchangeable erescent elevator
Abstract: Discuss a technique of oil tube elevator,introduce the constrution,principle,and safety of the new oil tube elevator latcher,and analyse the economic benefit and the apply prospect of the oil tube elevator with the exchangeable erescent elevator
文摘:介绍了新型吊卡销的结构和原理与安全性，剖析了可更换小月牙式油管吊卡的经济效益和推广应用前景。