Through Xiaobian's observation and understanding, the mid-range door locks that are mainly produced in the local market in Guangdong are different according to the model and style. The price of each lock is between 100 yuan and 300 yuan. Of course, there are also quality. The second-grade low-end goods are also relatively popular, and the price ranges from 50 yuan to 100 yuan.
In addition to these low-end goods, many stores also have some high-level door locks. Most of these high-grade locks are foreign products, and the price ranges from 600 yuan to 2,000 yuan. The salesperson told Xiaobian that the door locks were generally bought by the villa customers.
When a commercial household tells Xiaobian, when selecting a lock, first of all, it is necessary to observe whether the surface of the product is flat and lubricated, including whether the lock, the lock body, the lock tongue, the handle and the related accessories are all in place, and the color of the lock is not bright and uniform. Whether there are rust, signs of oxidation and damage.
"Check the performance of the lock is not reliable, flexible, you can select two or more products for comparison check." The salesperson said that when purchasing two-way lock goods, it is necessary to use all the keys to test the inner and outer locks separately. Use the key to repeatedly insert and remove the keyhole several times to see if the application is flexible.
In addition, he also reminded consumers to pay attention to the selection of locks in line with the opening direction of their homes. Since most locks on the market are single-open doors, there are also double-open doors, which are used in villas and are more expensive.
Visiting the store experience: the lock market is mixed, Xiaobian found a large number of door locks with only 10 yuan, but from the surface, the feeling of hand touch, etc., the quality is relatively poor. Therefore, try to purchase excellent brand-name products with high reputation, the quality of these products is guaranteed, and there will be a long-term warranty period.
At present, in the process of isolation and preparation of various stem cells from various tissue sources, Centrifuge Tubes with a volume of 15ml and 50ml are used.
It is one of the low-value consumables with high usage rate. It is generally installed on a dry foam rack with the package or in bulk. When used, it is taken out by the operator and placed on the plastic centrifuge tube rack in the ultra-clean workbench. The common centrifuge tube rack can only make the centrifuge tube stand upright. When transferring liquid or needing centrifugation, the operator should hold the centrifuge tube in the left and the night gun or aspirator in the right. If it is necessary to transfer a large amount of liquid reagents or perform gradient centrifugation operations, such as density gradient centrifugation to separate mononuclear cells, the operator needs to hold the centrifuge tube with the right hand for a long time and tilt the centrifuge tube, which often causes the operator's wrist joint pain. At the same time, it will also affect the liquid superposition effect, which will easily lead to the mixing of liquids of different densities, resulting in the failure of the experiment.
centrifuge tube rack bulk,tube rack for centrifuge,rack for centrifuge tube
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yonyue.com