The lock cylinder adopts a n♠♣umber of anti-theft techn¶​§ologies and a variety of special-shape<€d anti-pulling bullets to prevent techni§×¥cal opening. With the unique structure des♠ α♥ign of bullets and blades, it h♥'÷φas high safety performance o§β₹f preventing technical opening. The lo∞"ck container is equipped with pr≥>€ecision number marble and special-£&±shaped marble structuφ↓₽res, which will be automa₹♥tically locked when the number marble₽' and special-shaped marble must be pulled a€←t the same time during the technical opening, ‌&©thus making the technical opening fail. The lo€​ck cylinder uses a variety of sp£≤ecial-shaped marbles and multiple combinatio♣↓₩ns, which can compile up to♣β∞ billions of key numbers, thus'♥ realizing zero-opening of regions (one in 16 £γδ♦million). The lock cylinder is added with a sδα±♣ide-to-side pressure-type side post lock€¶δing pin device, which greatly improves the a×δbility to prevent violent torsion.

Anti-theft standard
The security level of anti-theft>✘↑ locks is divided into A,♣ε B and C levels acco₩¥★↕rding to national standards.
1. Class A lock cylinder, prev§✘ ent technical opening ≥ 1 ∞✘↑minute, anti-drilling ≥ 10 minutes, ≤ → anti-sawing ≥ 5 minutes, anti-♠¥αprying ≥ 10 minutes, an≈↕ti-pulling ≥ 10 minutes, anti-impact ≥ 10 ♠ε¶minutes.
2. Class B lock cylinder, p£↔reventing technical opening ≥ 5 minutes, ant↓  i-drilling ≥ 15 minutes, anti-sawing ≥ 5 minutes&♦←, anti-prying ≥ 15 minutes, ∏₩↕anti-pulling ≥ 15 min♣€δ utes, and anti-impact ≥ 15 minut ≈∏es.
3. Class C lock cylinder, preventing techni↔$α¶cal opening ≥ 10 minutes, anti-dril→↕€δling ≥ 30 minutes, anti-sawing ® ≥ 30 minutes, anti-prying ≥ 30 minutes, anti-pu€"∞lling ≥ 30 minutes, an¶‌d anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or cres♣×αcent, with a row of concave keyway on α‍€one side or both sides or a ​>∏convex keyway on four ≠ ♠sides of the cross;
Class B: The key is flatγλ or crescent, with two ro♣↕←ws of concave keyholes or cylindric♥∑al multi-point concave ↓ →keyholes on one or both ≤σ★→sides;
Class C: The key is f♣<lat, with two rows of concave and S-shaped'π"​ keyway on one or both sid↔≥es, or double snake ke<↔σyway inside and outside;

Purchase Standard
The safest lock cylinder has been upgrade•₽™Ωd to Class B and Class<$‍™ C. It is best to choose Class C when purchasing≈&.
The first move: I used to buy a lock to judge♠•≈Ω the quality of the lock ∑©>cylinder by the number of key tee¶©¥th. It mainly depends on th©ε←e structure of the lock cylinder. The &π>♣blade side column structure is often much betterα± than the traditional marbles structur¥σ♥e. When picking a lock, it is  '♦better to ask a professional teacher for advice aε<≤nd then pick it according to the sit λuation.
The second move: pick the lock and weigh t ' wo, one than the weig£÷✘​ht and two to look at the loc↓±♥§k cylinder. The heavier the we&φight, the better the quaλ→lity of the lock cylin♥‍der, and the more beads in the locδ€&αk cylinder, the better th‍∏e anti-theft function.
The third trick: choose the lockγ• cylinder to see the color, and compare tα™←∞he color to see the workmanship'λ✔∏. The good quality lock cylinde׶♦r adopts electroplating treatment, the surface i♥®s smooth and the color is bright. AΩ♣ βmong them, the dark yellow color is copper cor•∏λ₽e, which is relatively strong and has good a♣£nti-theft performance. The lock core is dim in γ®♥color and zinc alloy is gray and has bub§®πbles. The anti-theft performance is general±♠÷♣.
The fourth trick: The ↔φanti-theft performance oσ≤"f the key is poor when the key is inserted into'¶ the lock cylinder. After the key is≈λ© half inserted, use 5 to 7 component Ω™φforce to rotate clockwise or counφ±☆>terclockwise and continue to ™σpress the key into the lock port. The sφ‍≥δtuck key indicates t∏☆ε¥hat the lock cylinder ₩€↓ has anti-theft performance. Poor, smoothly i→★♣₹nserting the lock cylinder€☆ in a half-rotation state indicates that the aγ↕'nti-theft effect is good.