jerry-built projects 豆腐渣工程
Other engines and projects -jerry has built numerous other interesting steam and IC engines, a CAM grinder and other projects that are detailed here.
其他引擎和项目-杰里已建立许多其他有趣的蒸气和内燃机，凸轮磨床和其他项目，是详细在这里。
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