SPIRIT LEVEL AND METHOD FOR INSTALLING A DRAGONFLY IN A SPIRIT LEVEL

• 1. 用于制造具有发泡的压敏胶粘剂层和在表面上结构化的胶带的方法 [P] . 中国专利： CN113004827A . 2021-06-22
• 2. 一种精神科可调节约束带及其安装方法 [P] . 中国专利： CN106726084B . 2019.08.30
• 3. Dragonfly, made with dragonfly holder, for use in a spirit level [P] . 德国专利： DE102009003158A1 . 2010-11-18

  机译： 蜻蜓，由蜻蜓架制成，用于水平仪

• 4. process for the production of a dragonfly for spirit levels. [P] . 德国专利： DE59100834D1 . 1994-02-24

  机译： 制作水平仪蜻蜓的方法。

• 5. Double-bead horizontal and vertical spirit level, apparatus using the spirit level, and method of measuring distance and height by using the apparatus [P] . 美国专利： US9733079B2 . 2017-08-15

  机译： 双珠水平和垂直水平仪，使用水平仪的装置以及使用该装置测量距离和高度的方法

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• 6. Modeling Human Exposure Levels to Airborne Volatile Organic Compounds by the Hebei Spirit Oil Spill [O] . Jong Ho Kim, Byoung Kyu Kwak, Mina Ha, 2012
• 7. XLV. Method of ascertaining distances from one station to another (in levelling or surveying) on level and variously inclined surfaces, to their exact length of horizontal base, by the addition of an angular bubble attached to the telescope of a spirit level [O] . John Hughes 1819

• 1. Boundary determination of leveling capacity for plate roller leveler based on curvature integration method [J] . 刘志芳1 ,罗远新2 ,严兴春2 . 中南大学学报 . 2015,第012期
• 2. Comparison of Self-levelling Underlayment to Traditional Methods Used in Brazil [J] . Guilherme Figliuzzi1 ,Elaine Vazquez2 ,Justino Nobrega3 . 土木工程与建筑 . 2019,第006期
• 3. 农圣文化的基本精神内涵考略——基于精神文化层面的研究 [C] . 李兴军 . 山东省农业历史学会2015学术年会 . 2015
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