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alcohol lamp aluminum alcohol lamp mini alcohol lamp metal alcohol lamp portable alcohol lamp
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Digital timer storage type multi-functional new curriculum standard Senior high school physics free fall acceleration teaching instrument
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Outside micrometer screw micrometer 0-25mm mechanical outside diameter measuring centimeter caliper teaching instrument
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Mud triangle ceramic mud support chemical experiment heating crucible support teaching instrument large quantity discount
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Teaching triangle plate large magnetic belt handle triangle ruler compass protractor teaching equipment
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304 stainless steel aluminum alloy tripod metal tripod asbestos mesh laboratory beaker flask alcohol lamp holder
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Resistance Law Experimenter Electrical Experimental Equipment Teaching Aware Students Use Resistivity Middle School Physics Teaching Device
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initial Senior high school chemical molecular structure model 32003 organic matter atom ball bond rod scale model ball stick model
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Graduated pipette brush pipette brush 12 5 10 25 50ml multi-specification teaching instrument manufacturers sell
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initial Senior high school chemical molecular structure model 1032 organic matter atom ball bond rod scale model ball stick model
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Dalton Plate Galton Plate Random Phenomenon Demonstration Model Gas Molecular Motion Rate Distribution Statistics
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Neualizer J26013 determination of strong acid and strong alkali reaction chemical experimental equipment teaching instrument
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Small Air Source Senior high school Physical Mechanics Experiment Air Source Air Cushion Guide Accessories New Curriculum Standard Instrument Teaching Instrument
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Digital display constant temperature water bath single-hole biochemical laboratory constant temperature heating teaching instrument
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Burning cup brush glass beaker brush small size large for 150/200/250/500/1000ml
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Glass rod type red water thermometer 20cm30cm red water kerosene 0~100 0~200 0~360 degree experiment
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Capacitor charging and discharging demonstrator digital display experimental board new curriculum standard middle school physics and electricity teaching aids experimental equipment
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Study on the Resistance of Boat-shaped Wood-chip Elementary School Science Boat-shaped Wood-block for the Shape of Object and the Resistance of Water
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Simple harmonic vibration projection demonstrator 22021 sine cosine wave projection dynamic pattern law change teaching instrument
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