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841 、 埋头铆钉 countersinkheadrivet 842 、 埋头锥孔 countersink 843 、 埋头螺栓 countersinkheadbolt 844 、 埋头螺丝 countersinkheadscrew 845 、 埋头钻 countersinkdrill 846 、
LESSoN EIGHT TEXT Telecommunication via Satellite At the beginning of the twentieth century, there were four powerful means of transmitting and receiving information over long distances: print, photog
Keeping Time With Quartz Most people know that wrist watches commonly contain quartz. In fact, if you wear a watch, chances are its a quartz watch, since most watches is made today use quartz. But, you may not know what quartz has to do with keeping
We brought it on air in November 2009. 我们在2009年11月的时候播出了这个节目。 But no, this was far more attractive. 但其实,这节目火了起来。 This is the five biggest TV channels in Norway on a normal Friday, 这张图是挪威
We have multiple failures on the inertial reference system. We are no longer able to fly oceanic route. Request return for landing. 481. 我们有多个惯导失效,我们不能再跨洋飞行,申请返场着陆。 We do not meet GPS approach req