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氣相側孔針頭
點擊次數：1982 更新時間：2016-09-21

Hamilton  pst5:帶有密閉端口和邊孔的圓錐形針頭，隔膜被刺穿時，不堵針,不損傷頂空瓶進樣口密封墊,也不損傷氣相色譜儀進樣口密封墊,延長密封墊壽命,提高分析成功率.能避免端口被阻塞。可用針號分布從10~26s。精細校準的非結晶乙烯基塑料針頭，具有理想的隔膜刺穿效果。

国产精品视频一区视频二区 _欧美黑人ⅹxxx另类猛交_国产网站免费看_成全视频全集
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