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. Yo dwe itilize renouvèlman an nan tib lwil oliv metal la, epi voye boul yo nan tèt la plim dwe fèt ak alyaj difisil - boul carbure tengstèn. Pèfòmans ekri a pi bon pase plim òdinè. Lank ki vide nan renouvèlman an dwe 424 lank ble ki pwodui nan yon pwen fiks. ak 322 lank nwa. De lank sa yo gen avantaj ki genyen nan solidite limyè, rezistans dlo ak enpèmeyab. Yo ka itilize renouvèlman boulpoint ki ranpli ak de lank sa yo pou ekriti achiv (ki gen ladan renouvèlman plastik tib, men koulè tib la dwe jòn limyè).
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.
