当套管柱下入井筒时支承套管柱的井口装置配件。
The subassembly of a wellhead that supports the casing string when it is run into the wellbore.
波音将把置换机翼部件交付到犹他州希尔空军基地，部件分为四部分：三个机翼剖面和一个装置零配件。
Boeing will deliver the replacement wing sets to Hill Air Force Base, Utah, in four parts: three wing sections and an installation kit.
应用推荐