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Tests tubes designed to withstand repeated sterilization cycles at high temperature (i.e., autoclaving). These devices are reusable test tubes made of high-temperature-resistant glass (e.g., borosilicate) or plastic. Autoclavable laboratory test tubes are frequently available with autoclavable (e.g., polypropylene, phenol) plastic caps; they are used in procedures that require a completely sterile enclosure, such as in bacteriology and tissue culturing.
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