HD
At the same time, Europe had begun to standardize gunpowder production. From purification, crushing, mixing, pressing, and drying, various processes were close to modern factory-based production. At the same time, ramming machines, roller compactors, and granulating mills Various machines that rely on water conservancy or animal power also began to gradually appear....
本网站所有内容均收录于互联网相关站点，本站不提供影片资源储存也不参与录制与上传，若本站收录内容侵犯了您相关权益，请给我们留言，我们将及时进行处理。
