A piece of blood-stained paper, caught up from some meat-buyer's dust-heap, beat up and down the road without the gate; too flimsy to rest, too heavy to fly away; and a few straws kept it company.

Ion gate is one of the important parts in an ion mobility spectrometer. The main function of the ion gate is to control the ions to fly into the drift tube in pulse mode.

Want to fly to the sky to see what, fly to the legend of "South Gate" look at me the worship of the deity who lived a kind of life.