Is the peristaltic pump flow accurate?

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As a positive displacement pump, the peristaltic pump has a metering function. The metering effect of a product depends on the design principle of the pump. The peristaltic pump uses a roller to squeeze the pump tube, so the accuracy depends on the inner diameter of the pump tube and the accuracy of the motor. It has a good metering effect in a small flow range. The pharmaceutical filling machine is the metering function of the peristaltic pump. The metering accuracy of the peristaltic pump can reach 1% or even 0.5% under small flow conditions, which is about three to four liters per minute.

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n the late twentieth and early twenty-first century, heavy eye liner use has been associated with Goth fashion and Punk fashion. Eye liner of varying degrees of thickness has also become associated with the emo subculture and various alternative lifestyles. Guyliner is also a special style the emo subculture tend to use after being popularized from Pete Wentz, bassist of the pop-punk band Fall Out Boy.


A number of theories have been proposed to explain the function of the eyebrow in humans including that its main function is to prevent moisture, mostly salty sweat and rain, from flowing into the eye, or that clearly visible eyebrows provided safety from predators when early hominid groups started sleeping on the ground [1]

Recent research, however, suggests that eyebrows in humans developed as a means of communication and that this is their primary function. Humans developed a smooth forehead with visible, hairy eyebrows capable of a wide range of movement which are able to express a wide range of subtle emotions – including recognition and sympathy

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