Sie suchten nach: Woulffsche Flaschen
Featuring three standard ground joint necks instead of one or two, the woulff bottles are used between a suction flask and a vacuum source. The inclusion in the middle allows simple vacuum control in glass units without a separate tap and also prevents the filtrate in the suction flask from overflowing. Fabricated from borosilicate glass with an excellent chemical resistance and high temperature resistance, the woulff bottles are subject to minimal thermal expansion.
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