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SPI Mould ClassificationsLub Zej Zog ntawm Kev Lag Luam Yas Pwm Tsim Cov Qauv Cov Phiaj Xwm SPI Pwm tau tsim los ntawm US Society of Engineers Engineers (SPE), nrog lub hom phiaj ntawm kev simplified txhais ntawm ho...
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