Madebo hemisphere experiment courseware
[design concept]
In many aspects of human life and production, we need to use the knowledge of atmosphere and atmospheric pressure. Understanding and feeling...
The oblique pull bridge of the small production kit
The oblique pull bridge, also known as the oblique bridge, is a kind of bridge that pulls the main beam directly on the bridge tower with many...
Hand power generation: Size 8 * 10 * 11 Rotating the mechanical arm, through the belt pulley, big wheel with small wheel, small wheel with big wheel, do more power to generate current. Working...