Clip with letter opener for each ball point pen, fuel holder and the like.

• 1. 一种贵重金属制开信刀 [P] . 中国专利： CN208760284U . 2019.04.19
• 2. 一种贵重金属制开信刀 [P] . 中国专利： CN108528115A . 2018-09-14
• 3. Replaceable, combined clip with letter opener for each ball point pen. [P] . 德国专利： DE1859975U . 1962-10-11

  机译： 每个圆珠笔都有可更换的组合夹和开信刀。

• 4. tool for cutting, essentially a safety knife sharp tip, usable as a letter opener, letter opener and the like. [P] . IT233195Y1 . 2000-01-26

  机译： 用于切割的工具，本质上是安全刀的锋利尖端，可用作开信刀，开信刀等。

• 5. Strong paper clip usable also as letter opener and bottle opener - is formed from wire bent several times within single plane to shape outer and inner band sections [P] . 德国专利： DE2609308C3 . 1979-03-01

  机译： 坚固的回形针也可用作开信刀和开瓶器-由在单一平面内多次弯曲的金属丝制成，可成型外带和内带部分

• 1. Reasonable Ball Size of Ball Mill for Preparing Coal Water Fuel and Forecasting Productive Capacity [J] . 张荣曾, 刘炯天, 徐志强, 矿业科学技术（英文版） . 2002,第002期
• 2. Iptakalim, a novel ATP-sensitive potassium channel opener,inhibits pulmonary arterial smooth muscle cell proliferation bydownregulation of PKC-α [J] . Xiangrong Zuo, Feng Zong, Hui Wang, 生物医学研究杂志（英文版） . 2011,第006期
• 3. Performance evaluation of trash analyzer and opener blender for opening cotton lint samples used in fibre quality testing [C] . S V Ghadge, P G Patil, S K Shukla, IEEE International Conference on Technological Innovations in ICT for Agriculture and Rural Development . 2017
• 4. Development and examination of pop-top can openers and how they improve accessibility for an aging population. [D] . Sobczak, Zach. 2012
• 5. A Stabbing Injury to the Chest from a Letter Opener [O] . Holger Rupprecht, Harald Dormann, Katharina Gaab 2017
• 6. Manufacture Of Functional Open-Cell Al Foams With Recycled Al Scraps Using NaCl Ball Space Holder [O] . Seksak Asavavisithchai 2020
• 7. Assessment of the Impact of Organic Solvent Cesspool Cleaners and Drain Openers on Nassau County Drinking Water Supplies with Cover Letter [R] . 1974

• 1. MULTIPOINT BLANK HOLDER FORCE CONTROL IN HYDROFORMING OF FUEL TANK [J] . WU Yousheng ,WANG Xinyun ,XIA Juchen . 中国机械工程学报 . 2006,第002期
• 2. Beneficial effects of adenosine triphosphate-sensitive K^+ channel opener on liver ischemia/reperfusion injury [J] . Mateus Antunes Nogueira ,Ana Maria Mendona Coelho ,Sandra Nassa Sampietre . 世界胃肠病学杂志：英文版 . 2014,第41期
• 3. Hypoxic pulmonary hypertension and novel ATP-sensitive potassium channel opener: the new hope on the horizon [J] . Yu JIN ,Wei-ping XIE ,Hong WANG . 中国应用生理学杂志 . 2012,第006期
• 4. 胰管括约肌切开术获得胆总管通道与针刀切开的临床对照研究 [C] . 陈震 ,秦鸣放 . 第七届全国内镜外科研讨会 . 2009
• 5. 内镜下乳头括约肌切开术、柱状气囊扩张术及针状刀乳头括约肌预切开术的有效性和安全性研究 [A] . 郭彦东 . 2014