关于annular的百科

• annular eclipse造句怎么写

• Seeannulareclipsepictures.totalannulareclipseViewersasfarnorthasGreecewereabletoseeapartialeclipseduringtheJanuary15,2010,annulareclipse.Itwasreportedthattherewouldbeanannulareclipsetomorrow.Wehavechosenthebestplacetoobservetheannulareclipseofthesun....
• 2018-12-0418110

• annular preventer造句怎么写

• 1、HavetheHYDRIL[annularpreventer]pressure-testedto5,000psi.2、AdjusttheHYDRIL(annularpreventer)pressureto900psi....
• 2024-01-0511977