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Selepas beribu -ribu tahun evolusi, komponen utama kunci mekanikal masih silinder kunci dan plat kunci. Pada asasnya, hanya ada satu cara untuk membuka kunci dengan kunci. Piawaian ini agak bersatu dan boleh dihasilkan menggunakan acuan awam. Kos purata sangat rendah.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.