China has completed the test ignition of its largest solid-fuel rocket motor in the northwest city of Xi 'an.
中国已在西北部城市西安完成最大的固体燃料火箭发动机点火测试。
With a diameter of three meters, the solid-fuel rocket motor ran for 100 seconds after ignition.
中国已在西北部城市西安完成最大的固体燃料火箭发动机点火测试。
With a diameter of three meters, the solid-fuel rocket motor ran for 100 seconds after ignition.
中国已在西北部城市西安完成最大的固体燃料火箭发动机点火测试。
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