1. The high-grade ballpoint pens have obvious trademarks and model marks on the pen holder, and there are also obvious brand names, production dates and "DA" marks at the end of the refill ("DA" marks are the first two characters in Chinese Pinyin of archives. combination of letters).
2. Yuav tsum tau siv cov khoom siv ntawm cov hlau roj raj, thiab cov khoom ntawm lub taub hau cwj mem yuav tsum tau ua los ntawm cov hlau tawv tawv - tungsten carbide cov khoom. Kev sau ntawv tau zoo dua li cov cwj mem ballpoint zoo tib yam. Tus number case poured rau hauv lub refill yuav tsum yog 424 ntshiab xiav number case ua nyob rau hauv ib tug taag point. thiab 322 tus cwj mem dub. Ob lub inks no muaj qhov zoo ntawm lub teeb nrawm, dej tsis kam thiab impermeability. Ballpoint refills uas muaj ob lub inks tuaj yeem siv rau kev sau ntawv archival (suav nrog cov yas tubing refills, tab sis cov xim ntawm cov tubing yuav tsum yog lub teeb daj tubing).
3. On the packaging of the goods, there are signs and marks such as the trademark, model, manufacturer name, place of origin and quality inspection certificate. Fake and shoddy goods, the ink poured into the refill is not the archival ink recognized by the State Archives Administration, there is no "DA" mark on the refill, and there is no trademark, model, factory name, origin, and some are smuggled from abroad. Unlicensed pens The core is assembled to pretend to be an imported high-grade ballpoint pen.
