Ancient Great Wall of China, the modern world, many of the television tower and the bridgeramp Zhang, are cases in point.
古代中国的万里长城,现代世界上的许多电视塔和斜张桥,都是这方面的例子。
2
By comparing the advantage and disadvantage of ramp current with other methods, ramp current method and up-and-down method are used to test sensitivity of bridge-wire Electrical Initiating Device.