| Name of product | specification | Materials | Steel factory / origin | Today's price (yuan/ton) | Yesterday's price (yuan/ton) | Change (yuan/ton) |
| Channel steel | 8/10#*8mm | Q235 | Tong Gang | 3600 | 3600 | constant |
| Channel steel | 16#*8mm | Q235 | Jinan Steel | 3600 | 3600 | constant |
| Channel steel | 28#*12mm | Q235 | Lai Gang | 3750 | 3750 | constant |
| Angle Steel | 63*6 | Q235 | Angang | 3520 | 3520 | constant |
| Angle Steel | 100*10 | Q235 | Shougang | 3310 | 3310 | constant |
| Angle Steel | 50*5 | Q235 | Shougang | 3450 | 3450 | constant |
| I-beam | 16# | Q235 | Pode | 3900 | 3900 | constant |
| I-beam | 25# | Q235 | Lai Gang | 3800 | 3800 | constant |
| I-beam | 36# | Q235 | Lai Gang | 3850 | 3850 | constant |
| I-beam | 40# | Q235 | Baogang | 3900 | 3900 | constant |
| H-shaped steel | 100*100**6*8 | Q235 | Lai Gang | 4500 | 4500 | constant |
| H-shaped steel | 150*150*7*10 | Q235 | Lai Gang | 3950 | 3950 | constant |
| H-shaped steel | 300*300*10*15 | Q235 | Ma Gang | 4120 | 4120 | constant |
| H-shaped steel | 400*400*13*21 | Q235 | Ma Gang | 4300 | 4300 | constant |
| H-shaped steel | 500*200*10*16 | Q235 | Ma Gang | 3920-3930 | 3920-3930 | constant |
| H-shaped steel | 700*300*13*24 | Q235 | Ma Gang | 4320-4330 | 4320-4330 | constant |
The cover glass is covered on the material on the glass slide, which can avoid the contact between the liquid and the objective lens, so as not to contaminate the lens, and can make the top of the observed cells in the same plane, that is, the distance from the objective lens is the same, so that the observed Images are clearer.Why do you need a coverslip when using a microscope
1. Make the object to be observed form a thin film, which is easy to transmit light and easy to observe;2. Make the specimen relatively fixed;
3. It is convenient to use the capillary phenomenon to form a gradient when adding various reagents (staining agent, acid, salt solution);
4. Avoid contamination of the specimen.
The purpose of staining the specimen with iodine solution is to make the cells more obvious under the microscope, and it can also kill the cells and prevent the cells from migrating.
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