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Clamps rau cov sij hawm ntaubntawv povthawj
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Digital Count up Countdown Timer for Exam Lab Exercise Study
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Digital Stopwatch Timer for Coaches Swimming Running Sports Training
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Cov sij hawm cov sij hawm uas Photogates
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Hooked Weight Set for General Science and Physics in Mechanical Balances
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Measuring Ruler for General Science and Math
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Mechanical Stopwatch Timer for Timekeeping in Sports and Competitions Timing
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Padded Weight for Recording Timers
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Precision Calibration Weight Set for Measurements in General Science and Laboratory
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Replacement Carbon Paper Disc
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Replacement Carbon Paper for Ticker Timer
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Replacement Recording Tape
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