Lusec
Lusec :
A unit of power used to express the performance or leakage of vacuum pumps. One lusec represents a flow of one liter per second at a pressure of one micrometer (or micron) of mercury, or 1 L·μmHg/s. Since "u" is sometimes used as a symbol for the micron, the name of the unit is an acronym for liter-micron/second. One lusec is equivalent to 0.001 315 6 atm·cm3/s or 133.3 Pa·cm3/s, which is the same as 133.3 microwatts
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