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Laboratory Flasks:

Laboratory flasks are lab vessels with wide  bodies and narrow, tubular necks. They can be used for mixing, measuring, and heating chemicals, samples, and solutions. 

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Chapman Specific Gravity Flask is used to determine approximate percentage of surface moisture and voids in fine aggregates. Upper and lower bulbs contain 175ml and 200ml, respectively. Stem is...
LeChatelier Specific Gravity Flask is used to obtain specific gravity of hydraulic cement, dust, sand, and other fine materials. Body holds about 250ml, small oval bulb in neck holds...

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