When purchasing harvester accessories, it is necessary to “choose two pairs of three to four lookupsâ€.
(1) Select manufacturers. When buying harvester accessories, it is best to purchase spare parts according to the brand of their own harvester, to the local accessories franchise point or to the agricultural machinery parts company with credit and regular purchase channels. Authentic products generally have good packaging quality, and the certificates, manufacturer's name, site and date of manufacture are complete. Remember not to buy "three no" accessories to prevent them from using fake and shoddy products.
(2) For the model number. When buying harvester spare parts, be sure to accurately remember the original spare parts models, specifications and drawing numbers. If possible, it is best to bring the replaced old part for comparison when purchasing, so as to avoid wrong selection. If there are several manufacturers of the same type of spare parts, try to use the same manufacturer's products as the original ones to match.
(3) Appearance. When buying spare parts, check whether there are flaws such as blisters, cracks, defects, scratches, and rust, and whether the joint surface is smooth, smooth, and whether there are burrs at the transition.
(4) Size. Measuring tools such as steel tape measure and vernier caliper can be used to check whether the fitting, fit and shape of the fittings meet the requirements. When purchasing shaft parts, it is important to check the shaft diameter and shaft straightness at the location where the bearing is fitted. If there is no caliper, the shaft diameter can be checked by the following method. Take a bearing for use with this shaft diameter, place it on the test journal, pressurize it by hand, and insert it. Use even force and do not deflect. Then according to the press into the situation to determine: If you can press to the installation position, indicating that the journal outside diameter size is too small, fit too loose; if you can not insert the journal, when the hand off the bearing, the bearing will be measured from the journal If it falls, it indicates that the outside diameter of the journal is too large and the fit is too tight. The ideal fit is that the inner ring of the bearing can be pressed into the journal for a certain length of length, and the shaft is erected so that the bearing is directed downward and the upper end of the shaft is struck by hand. At this time, the bearing does not come off the journal.
When you purchase the harvester cutter, you should focus on checking the straightness of the cutter beam and arbor and several working clearances. The power is pushed to coincide with the center line of the blade and the centerline of the blade guard. At this time, the front blade clearance of the blade and the blade guard is no more than 0.5mm, and the backlash is no more than 1.5mm, and the quantity must not exceed 1/3 of the total; The clearance between the press blade and the moving blade is not more than 0.5mm, and the cutter should be pulled by hand, and there should be no seizure. Satisfy the above conditions, is a qualified cutter, otherwise do not buy.
Hyaluronic Acid Eye Drops Sodium Hyaluronate (HA), Pure Hyaluronic Acid could be used in eye surgery, such as Hyaluronic Acid Eye Drops, corneal transplantation, cataract surgery, glaucoma surgery, and surgery to repair retinal detachment.
Eye Drop Grade Hyaluronic Acid Powder is an important component of intercellular substance, eye vitreous body, joint fluid and other connective tissue. It acts the important physiologic roles in holding body's moisture, maintaining extracellular space, adjusting osmotic pressure, lubricating and promoting cells to repair in the body. Sodium Hyaluronate can be used as viscoelastic agent inintraocular lens implantation operation, as the filler in the osteoarthritis and rheumatoid arthritis and otherjoint surgery, as a medium widely used in eye drops, it also can be used to prevent postoperative adhesion and facilitate the wound heal. The compounds formed by the reaction of Sodium Hyaluronate with other drugs play a drug release effect role, thus achieve the purpose of drug targeted and time controlled release.
With the development of medical technology, Sodium Hyaluronate has been more and more widely used in medical applications. In 1976, Sodium Hyaluronate was first commercialized and used as ophthalmic viscoelastic agents, which is a significant progress in the ophthalmic industry. In 1987, Sodium Hyaluronate for intra-articular injection came in to the market. In 1990s, the large-scale production of Sodium Hyaluronate by fermentation made the cost lower, thus products containing Sodium Hyaluronate such as eye-drops, dermal fillers and other Sodium Hyaluronate preparations started to be used extensively.
Specification
|
Test Items |
Standard |
|
Appearance |
White powder |
|
Hyaluronic acid |
≥95% |
|
Molecular weight |
≥2.0 X 106 Da |
|
PH |
6.0-7.5 |
|
Loss on drying |
≤10% |
|
Protein |
≤0.08% |
|
Nitrogen |
3.0%-4.0% |
|
Heavy metal |
≤10ppm |
|
Bacterial counts |
≤80cfu/g |
|
Mold and Yeast |
≤10cfu/g |
|
Sterile Test |
Complies |
|
Shelf Life |
Two Years |
|
Conclusion |
The results meet the standard |
Eye Drop Grade Hyaluronic Acid Powder
Pure Hyaluronic Acid Powder,Hyaluronic Acid Eye Drops,Hyaluronic Eye Drops,Eye Drop Grade Hyaluronic Acid Powder
Qufu Hi-Tech Trading Co., Ltd. , https://www.chinahyaluronic-acid.com