| 工厂机器的噪声 |
2007-6-16 20:26:30 |
0 K |
8 |
★★★ |
| 给刨床加油 |
2007-6-16 20:26:05 |
0 K |
6 |
★★★ |
| 给缝纫机加油 |
2007-6-16 20:25:34 |
0 K |
7 |
★★★ |
| 各种电池 |
2007-6-16 20:25:13 |
0 K |
11 |
★★★ |
| 隔音壁 |
2007-6-16 20:24:50 |
0 K |
10 |
★★★ |
| 高压线 |
2007-6-16 20:24:26 |
0 K |
7 |
★★★ |
| 钢球厂的噪声 |
2007-6-16 20:23:59 |
0 K |
6 |
★★★ |
| 伏安法测电阻 |
2007-6-16 20:23:41 |
0 K |
152 |
★★★ |
| 沸腾实验 |
2007-6-16 20:23:08 |
0 K |
935 |
★★★ |
| 飞机起飞 |
2007-6-16 20:22:21 |
0 K |
39 |
★★★ |
| 放鞭炮的噪声 |
2007-6-16 20:21:59 |
0 K |
9 |
★★★ |
| 防噪声控制间 |
2007-6-16 20:21:30 |
0 K |
3 |
★★★ |
| 防噪声耳罩 |
2007-6-16 20:21:10 |
0 K |
8 |
★★★ |
| 防噪声耳塞 |
2007-6-16 20:20:49 |
0 K |
6 |
★★★ |
| 防噪声窗 |
2007-6-16 20:20:27 |
0 K |
12 |
★★★ |
| 发声体在振动 |
2007-6-16 20:20:05 |
0 K |
11 |
★★★ |
| 发电原理动画 |
2007-6-16 20:18:31 |
0 K |
21 |
★★★ |
| 发电机原理 |
2007-6-16 20:18:00 |
0 K |
547 |
★★★ |
| 发电机 |
2007-6-16 20:17:36 |
0 K |
356 |
★★★ |
| 发电机 |
2007-6-16 20:17:15 |
0 K |
13 |
★★★ |
| 二极电动机 |
2007-6-16 20:16:54 |
0 K |
36 |
★★★ |
| 二胡及声音 |
2007-6-16 20:16:26 |
0 K |
5 |
★★★ |
| 短路 |
2007-6-16 20:16:04 |
0 K |
150 |
★★★ |
| 短路 |
2007-6-16 20:15:44 |
0 K |
97 |
★★★ |
| 短路 |
2007-6-16 20:15:21 |
0 K |
14 |
★★★ |
| 电阻箱 |
2007-6-16 20:14:28 |
0 K |
14 |
★★★ |
| 电阻的串联 |
2007-6-16 20:13:39 |
0 K |
106 |
★★★ |
| 电阻的测定 |
2007-6-16 20:13:15 |
0 K |
50 |
★★★ |
| 电阻的并联 |
2007-6-16 20:12:51 |
0 K |
65 |
★★★ |
| 电熨斗 |
2007-6-16 20:12:29 |
0 K |
7 |
★★★ |
| 电熨斗 |
2007-6-16 20:12:04 |
0 K |
10 |
★★★ |
| 电压表 |
2007-6-16 20:11:43 |
0 K |
11 |
★★★ |
| 电闪雷鸣 |
2007-6-16 20:11:17 |
0 K |
8 |
★★★ |
| 电热取暖器 |
2007-6-16 20:10:49 |
0 K |
10 |
★★★ |
| 电热取暖器 |
2007-6-16 20:10:26 |
0 K |
5 |
★★★ |
| 电气秋千 |
2007-6-16 20:10:06 |
0 K |
5 |
★★★ |
| 电瓶车 |
2007-6-16 20:09:43 |
0 K |
11 |
★★★ |
| 电能表 |
2007-6-16 20:09:22 |
0 K |
9 |
★★★ |
| 电能表 |
2007-6-16 20:08:57 |
0 K |
7 |
★★★ |
| 电能表 |
2007-6-16 20:08:35 |
0 K |
18 |
★★★ |
| 电炉 |
2007-6-16 20:08:09 |
0 K |
7 |
★★★ |
| 电炉 |
2007-6-16 20:07:47 |
0 K |
42 |
★★★ |
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