Prior to the invention of the printing press, books were copied on paper and paper, in the form of a long roll, which was unfolded during reading and was usually rolled up. The books in this period can only be loaded with scrolls. Han Yu’s “Send Zhuge Liang to Suizhou to study†said: “A lot of books are written by Minhou home, 30 thousand axes are inserted, and a toothpick is suspended. If a new hand is not touched,†Ouyang Xiu’s Return to Tianlu also said: “The Tang Dynasty books are all for scrolls. "After the popularity of engraving printing, because the book editions were formed into separate blocks, scroll loading was no longer applicable, and the installation of ancient books was improved to the form of albums. There have been several forms of cyclone, discreet, back-loading and line-loading. The form of threading is still in use today.
Scroll loading, also known as volume loading, early book binding formats. Similar to good calligraphy and painting. Attach a wooden shaft to the left end of the long scroll and paper book and rotate it (Fig. 1). A large number of books in the Tang and the Five Dynasties found in the Dunhuang Stone Room were all adopted this way. According to records, the ancient palace collection scroll book is very elegant, "Sui Tang Jing Zhi" description of the secret library collection: "the upper red glass axis, the middle product glass axis, the next product paint axis"; "Tang Liudian" description of the Inner House collection: " The book of the library, the white tooth shaft, the yellow toothpicks; the Shiku book, the green tooth shaft, and the white tooth with white ribbons. "After entering the era of engraved engravings, the books were changed into album forms, and some were still loaded with scrolls, such as "Open." "Treasure", "City of Zhao City," and so on.
The cyclone is affixed to the pages of a plain paper roll and the pages of the book are pasted in order. Each page is written on both sides of the page. Zhang Shouji's “Infandel Manchu†describes it as “leaving by leaf and rolling to the end, still being combined into one roll.†This binding feature is that the appearance is still a long scroll, but there is a patchwork of pages in it. A binding form between the folded and folded (Figure 2). About prevailed in the Tang Dynasty. The National Palace Museum has five volumes of the Tang dynasty "Book of Supplements and Deficit Rhyme", which is the use of this cyclone.
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The tripod Turnstile Gate is suitable for all kinds of places that require pedestrians to pass in an orderly manner after verification.
Advantage
1. Fully rainproof tripod barrier gate cabinet made of stainless steel. Compared with pedestrian access equipment such as wing gates and swing gates with general functions, the tripod baffle gate are more cost-effective and good-quality.
2. RFID tripod turnstile gate has a personalized installation interface (such as card reader, indicator light installation, etc.) to ensure that the control gate equipment of the system integrator is simple and convenient during installation.
3. The movement of the 3 arm tripod turnstile gate has an automatically adjusted hydraulic shock absorber. When the tripod turnstile is used, the sound is very small and there is no impact, and the brake lever automatically decelerates and returns to the center. The surface of the movement is electroplated with yellow dichromate.
4. Semi-automatic tripod turnstile gate can be programmed with gate control, one or two direction control (set by the user).
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