Security door in the A-level lock, B-lock, C-level lock What is the difference?
B-level lock: B-key lock for the flat key, a double row of the ball slot, with the A-level lock is different from the key surface of a row of curved irregular lines. The main type of lock cylinder is 3, the computer double row cylinder, double row crescent cylinder, double blade cylinder core. Anti-technical open time 5 minutes, the mutual high rate. Through the torsion tool, 1 minute can open the cylinder.
A-level lock: Currently on the market A-level anti-theft lock key is a word key and cross key. A-level cylinder internal structure is very simple, limited to the changes in the ball, the ball slot less shallow. Anti-technical open time 1 minute, the opening rate is extremely high. The ball structure is a single row of balls or a cross lock.
Anti-theft door lock level: in the market to use the anti-theft door cylinder is basically divided into three, namely, A, B, super B (also known as C). According to the "national mechanical lock standard" anti-theft door lock core with A and B two levels, super B-class is another development of the enhanced version of B-class.
Super-B-level lock (C-level): the key shape for the single-sided blade within the milling slot or outside the milling key, the cylinder type for the side of the cylinder; by the Ministry of Public Security detection 270 minutes can not open technology, One thousand six hundred thousandths). The ball structure for the double-row blade plus V-side lock; if you use a strong twist tool to open the lock cylinder, cylinder internal damage, blew lock, resulting in can not open.
