masturbation-nude,Diaphragm Vacuum Pump is used for vacuum filtration , reduced pressure distillation , rotary evaporation , vacuum concentration , centrifugal concentration , solid phase extraction etc .
cock-hero,DP SeriesDiaphragm Vacuum Pump –Teflon Anticorrosive(20~60L)
1.Corrosion resistance , able to tolerance almost all strong acid (including aqua regia) , strong alkali , strong oxidizer , reductant , and variety of organic solvents . 2.Withstand high and low temperatures , can be used in temperature of -190℃ to 260℃ . 3.Non-stick surface , most solid material and impurity particles can not conglutinate on the surface .,hentai-tubes
DP-201,naked-lizaDiaphragm Vacuum Pump 25L
naked-chudai, Providing vacuum condition for the processes of evaporation, distillation, crystallization, drying, sublimation, filtration and decompression and degassing. And solvent recollection, extracting for various materials with severe toxicity, flammability and probability of explosion, strong acid and alkali. Besides applicable occasion of circulating water...
DP-401,brazzers-modelsDiaphragm Vacuum Pumps 45L
To provide vacuum conditions for evaporation, distillation, crystallization, drying, sublimation, filtration under reduced pressure. Subject to the provisions applicable in the case of circulating water pumps and rotary vane vacuum pump, but also for medical and pharmaceutical product analysis, forensic technology and other areas of public security.,fullhdporno
VP-B95 Series,hd-sexy-video-mp4Water Circulating Vacuum Pump
www-xxx-man, Be suitable for the research experiment, small scale test and small scale production process which have the processes such as evaporation, distillation, crystallization, drying, sublimation, filtration and decompression, degassing. The operation principle is the same as that of desk-top type pump. Compared with the desk-top type pump, the bleed air flow...
VP-III/IIIA/IIIS/IIIT,sex-video-movieMulti-purpose water circulation vacuum pump (Desktop)
porn-video-paris, Multi-purpose Circulating Water Vacuum Pump takes circulating water as working fluid, uses the negative pressure created by fluid jet to eject