ᴡʜᴀᴛ ɪs ᴛᴇsᴛ ᴛᴜʙᴇ
ᴋɴᴏᴄᴋ ᴋɴᴏᴄᴋ ᴋᴏɪ ʜᴀɪ ᴋʏᴀ
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A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top and closed at the bottom. Test tubes are usually placed in special-purpose racks.
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