| 1. | En iso 4044 leather . preparation of chemical test samples
皮革.化学试验样品制备 |
| 2. | Cr leather - chemical tests - determination of chromic oxide
皮革.化学试验.氧化铬 |
| 3. | Leather - chemical test - determination of volatile
皮革.化学试验.挥发物的测定 |
| 4. | Rubber physical tests and chemical tests - terms
橡胶物理试验和化学试验术语 |
| 5. | We will do a chemistry experiment this friday
这个周五我们要做化学试验。 |
| 6. | Leather - chemical tests - determination of volatile matter
皮革.化学试验.挥发物质测定 |
| 7. | Leather - chemical tests - determination of volatile matter
皮革.化学试验.测定挥发性物质 |
| 8. | Leather - preparation of chemical test samples
皮革.化学试验样品的制备 |
| 9. | Leather - preparation of chemical test samples
皮革.化学试验样品的准备 |
| 10. | Leather - chemical tests - determination of formaldehyde content
皮革.化学试验.甲醛含量的测定 |
