Yongyue cryo vials are made of medical grade polypropylene (PP) and have no endotoxin. They are disposable laboratory consumables specially used for storing biological samples. Cryo Vials,Cryovial 2ml,Cryotube 1.8 ml,Cryogenic Vials,0.5 ml Cryogenic Vials Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yonyuetip.nl
The anti-slip texture of the cap and body is easy to screw cap.
The tube cap has an O-ring built-in gasket to prevent liquid leakage.
The cryo tube is suitable for ultra-low temperature refrigerators, and the tolerance temperature is -86~121 °C, and it can be repeatedly frozen and thawed.
In the gaseous state of liquid nitrogen, it can withstand low temperature to -167 ℃.
According to different requirements, there are ordinary grade and PCR grade. PCR grade products are free of DNase, RNase, endotoxin and foreign DNA. Sterilized by gamma irradiation, sterile.
1. Design and manufacture of four-blade twist drills, as shown in Figure 1. In addition to adding two spiral cutting edges on the drill back, the other is exactly the same as the general twist drill, only need to choose a suitable thickness. A concave arc milling cutter that guarantees the width of the two front and rear belts, mills out the drill back?, leaving four spiral cutting edges, and then milling the chamfer with a 45° milling cutter.