在山顶xuxu,一定要PP向上,由自身重力平衡xuxu的推进力.先进的潜艇两栖装甲车都有喷水推进系统,原理与此类似
在山顶xuxu,一定要PP向上,由自身重力平衡xuxu的推进力.先进的潜艇两栖装甲车都有喷水推进系统,原理与此类似
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