Optical element, method for producing the element, and optical pick-updevice.
光元件，生产该元件的方法，和光拾取器。
2
An utterly new conception was proposed of a device on gathering and storing scattered wind power that exists in nature. Such economizing pick-updevice can be equipped on the oil-extracting pump.
提出一种可以随机采集在自然界广泛存在的零星风力的装置，用于石油抽油泵的节能。
3
Indeed, Mr. Prance's new device can pickup the trace of a heartbeat from a metre away.