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Glass frit Support

Glass frit support is designed to collect filtrate directly into standard laboratory bottles. The connection to the bottle is formed through a polybutylene terephthalate (PBT) cap and a PTFE-faced silicone seal ring.

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91高清自产国产拍,无码免费A级毛片大全,日本 欧美 国产中文字幕,99re热视频这里只有精品视频首页

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