| 1 |
13:18 512 |
| 2 |
15:53 417 |
| 3 |
19:53 431 |
| 4 |
25:02 377 |
| 5 |
25:24 381 |
| 6 |
21:52 364 |
| 7 |
17:14 361 |
| 8 |
25:26 434 |
| 9 |
15:21 382 |
| 10 |
12:58 342 |
| 11 |
19:48 387 |
| 12 |
25:26 333 |
| 13 |
14:25 640 |
| 14 |
12:41 350 |
| 15 |
09:55 514 |
| 16 |
12:59 375 |
| 17 |
18:21 458 |
| 18 |
11:27 495 |
| 19 |
11:40 335 |
| 20 |
17:14 340 |
| 21 |
13:11 338 |
| 22 |
07:52 383 |
| 23 |
45:10 390 |
| 24 |
25:58 440 |
| 25 |
15:33 344 |
| 26 |
51:38 382 |
| 27 |
06:38 417 |
| 28 |
05:44 479 |
| 29 |
08:52 429 |
| 30 |
00:00 427 |
| 31 |
00:00 525 |
| 32 |
00:00 489 |
| 33 |
00:00 420 |
| 34 |
00:00 382 |
| 35 |
00:00 411 |
| 36 |
00:00 403 |
| 37 |
钢结构用钢材拉伸性能试验(屈服强度、抗拉强度、断后伸长率、断面收缩率) 00:00 510 |
| 38 |
00:00 444 |
| 39 |
00:00 461 |
| 40 |
00:00 431 |
| 41 |
00:00 364 |
磁粉检测的基本知识和原理