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SPECIMEN JAR with ground-in glass stopper with knob -
PNEUMATIC TROUGH round form -
MORTAR machine pressed,with glass pestle -
VACUUM DESICCATOR with ground-in stopcock and porcelain plate -
VACUUM DESICCATOR with ground-in stopcock and porcelain plate -
VACUUM DESICCATOR with ground-in stopcock and porcelain plate,amber glass -
DESICCATOR with porcelain plate -
DESICCATOR with porcelain plate，amber glass -
BELL JAR high straight form -
BELL JAR high straight form,with knob
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