the Americans developed a rocket to use against the Mexicans in the mid-nineteenth century
2. 对比
Indian rockets described as an iron envelope about 200 millimeters long and 40 millimeters in diameter with sharp points at the top and a 3m-long bamboo guiding stick
it was completely encased in a stout, iron cylinder, terminating in a conical head, measuring one meter in diameter and having a stick almost five meters long
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