成人做爰免费视频免费看_成人a级高清视频在线观看,成人a大片在线观看,成人a大片高清在线观看,成人av在线播放,一a一级片,一级黄 中国色 片,一级黄 色蝶 片,一级黄色 片生活片

Product Introduction：
SG-3020 series oscillator is a way to sample a variety of conditions in the same biochemical oscillation mixing apparatus, the oscillator is the same advanced technology and quality products, reliable products, operating balance, noise, vibration stepless speed can be tone. Stainless steel circling （special fixtures can be customized）, can be equipped with a variety of meeting the needs of customer needs, is a plant, biological, microbial, biological products, genetics, viruses, medicine, environmental protection, scientific research, education and productive sectors essential laboratory equipment.
Features：
1.equipped with mechanical timer
2.Variable speed, smooth operation
3.Universal spring test bottle rack is especially suitable for a variety of comparative test of the training preparation of biological samples.
4.Simple, safe operation, the oscillator for the floor, the whole center of gravity low, continuous oscillation in smooth and reliable work.
5.SG-3020F type and SG-3020FS-type oscillations with horizontal and vertical oscillation of the integrated function of two control systems: vertical bench with a clamp, to clamping a variety of test conditions, oscillations in the same bottle and mix well. Level of oscillation is equipped with universal spring testing bottle rack, especially for multiple comparison tests for the c*tion of biological samples preparation. Simple and safe, a multifunctional.
5.SG-3020ES model with a digital speed function, can accuray show the level of reciprocating motion speed, precise control of experimental conditions conducive to the user.
6.SG-3020FS model with a digital speed detection function, which can accuray show the level of speed and vertical reciprocating motion velocity. Help the user precise control of experimental conditions.