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ZETA-PM94 Series,liberty womanizerZeta potential measuring
Solid micro electrophoresis instrument (Zeta potential instrument) can be used to determine the dispersion of particulate matter - liquid interface is electrically (ζ potential), can also be used to measure the emulsion droplet interface electrical properties can also be used to determine the isoelectric point, Interfacial Reaction mechanism process.,granny and mature lesbians f each other with dildos
ZETA-PM01,anal sex toy self fuckingThick paste electrophoresis
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