Ring-shaped This is done by a great number of ring-shaped air jets on the bottom of the craft. 船底裝上大量環(huán)狀噴氣嘴以實(shí)現這一目的。
The basic mechanism is an air jet supplied by an accurately regulated pressure. 其基本機械結構是一個(gè)空氣噴嘴，噴嘴壓力經(jīng)過(guò)精確調整。
As beans fall into bins, photoelectric cells detect duds, signaling for them to be rejected individually with a puff from an air nozzle. 方式是在豆子落入容器的過(guò)程中，利用光電管挑出其中的壞豆子，然后送訊號給空氣噴嘴對準一吹，將壞豆子個(gè)別剔除。
