有没有石油钻机装备的前辈啊,帮忙给看看,这个是什么意思,指的是什么产品,谢谢了。4 NR NC50 PIN X 6.5 8" REG. PIN CONN. OD 7. 3/8" ID 2.13/16" BODY LENGTH: 5.5/16" INSPECTION REQUIRED AS PER STANDARD DSI CAT 3-5 您好,这段话是针对一种石油钻机设备的描述。其中 "SER SUB FOR VARCO TOP DRIVE TDS-3H" 可能意味着这是一种用于替换"VARCO TOP
RT, Indeed it gives me great pleasure to acknowledge your I will appreciate very much tecno/commercial details for the product being manufactured and offer by you for doing the needful. No sooner I receive same will revert back to you with maximum possibl