-
EPO (Expanded Polyolefin) foam is a popular material for RC (radio-controlled) airplanes, and for good reason—it offers a good balance between durability, weight, and ease of manufacturing. Here’s what you should know about EPO foam in the context of RC
https://www.youtube.com/@thang010146 <Transmission with teeth-uncompleted gears 9> 输入：橙色齿轮 其剩余齿数 Z1c = 1 其总齿数（完整齿）Z1 = 20 其切除齿数 Z1f = Z1 - Z1c = 19 输出：绿色齿轮 其总齿数（完整齿）Z2 = 36 当橙色齿轮旋转1周时，绿色齿轮旋转1/6周 本视频STEP文件： http://www.mediafire.com/file/4
蚂蚁窝被水淹没时会发生什么
日本七尺弓的独特设计
《火：牛津通识读本（图解版）》 Fire: A Very Short Introduction Illustrated Edition
提升阳气的好办法
牙周膜愈合的移植牙，可以正畸移动。活髓的移植牙。
科学科普 0
0