5.The paper introduces a new type slim - hole MWD tool, which is capable of accurately measuring downhole annular pressure and pressure effect caused by swabbing and waveness.
6.A new multiflow model of a pressurized spout fluid bed with a draft tube has been developed to investigate the voidage and the velocities of particle and gas in spout and annular region.
19.Because the moon is farther than usual from Earth during an annular solar eclipse, the moon will not completely cover the sun like a " total eclipse."
20.Because the sun is never fully blocked by the moon in an annular solar eclipse, it is never safe to look directly at it without such eye protection.