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. Ní mór athlíonadh an fheadáin ola miotail a úsáid, agus ní mór liathróidí an chinn peann a bheith déanta as cóimhiotail chrua - liathróidí chomhdhúile tungstain. Tá an fheidhmíocht scríbhneoireachta níos fearr ná feidhmíocht pinn gránbhiorach gnáth. Ní mór 424 dúch gorm íon a tháirgeadh ag pointe seasta a bheith sa dúch a dhoirtear isteach san athlíonadh. agus 322 dúch dubh. Tá na buntáistí a bhaineann le fastness éadrom, friotaíocht uisce agus neamh-thréscaoilteacht ag an dá dúch seo. Is féidir athlíonta gránbhiorach a líonadh leis an dá dúch seo a úsáid le haghaidh scríbhneoireacht chartlainne (lena n-áirítear athlíonta feadáin phlaisteacha, ach caithfidh dath an fheadáin a bheith ina fheadán buí éadrom).
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.
