The lock cylinder adopts a number o♣≥"φf anti-theft technologies←✔≈π and a variety of special-shape₽₹¶d anti-pulling bullets to prevent technical opeσ™σ ning. With the unique structure design of bulle♦π ts and blades, it has high safety perform®£ance of preventing technical opening. The loc♣≤₩♥k container is equipped with precisiΩ♦on number marble and special-shaped m‍€εarble structures, which will be automatically loc€​≠βked when the number marble anαε>"d special-shaped marb♥>le must be pulled at the same time§♥÷∑ during the technical opening, thus making the •£↕♥technical opening fail. π↑The lock cylinder uses aπ$ variety of special-shaped marb↑↑≥ les and multiple combinatio£☆≠ ns, which can compile up to billions of key nu©↑§¥mbers, thus realizing zero-op♦¥©ening of regions (one i$≥n 16 million). The lock cylinder ₩★φ is added with a side-to-side pressure-t←™≈±ype side post locking pin ¶→device, which greatly impro×® ¶ves the ability to preveπ☆£nt violent torsion.

Anti-theft standard
The security level of anti-theft locks is d∏ αivided into A, B and C levels according to n♣<↓♦ational standards.
1. Class A lock cylinder, p≈↓★revent technical openiσβng ≥ 1 minute, anti-drilling ≥ 10 minutes, an← ti-sawing ≥ 5 minutes, anti-prσ★ying ≥ 10 minutes, anti✔€↓σ-pulling ≥ 10 minutes, anti-impact ≥ 1 ≤≈₹0 minutes.
2. Class B lock cylinder, ×★preventing technical opening ≥ 5 minutes, anti-d↓φ✘φrilling ≥ 15 minutes, anti-‌♠‍sawing ≥ 5 minutes, anti-prying ≥ 15 minutes, ant£∞i-pulling ≥ 15 minutes, and anti-impact ≥ 15 min☆γutes.
3. Class C lock cylinder, preventing technical↔✘δ opening ≥ 10 minutes, anti-drilling ≥ 3↑×"0 minutes, anti-sawing ≥ 30 minutes, a¶‌nti-prying ≥ 30 minutes, anti-pu¶' lling ≥ 30 minutes, anσ£✔d anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat o♣±r crescent, with a row of concave keyw≠$ay on one side or bo♦δth sides or a convex k‍→eyway on four sides o¥ f the cross;
Class B: The key is flat or crescent, wit♠λ♥αh two rows of concave keyholes or cylin" πdrical multi-point concave keyholes ≠₽↕&on one or both sides;
Class C: The key is flat, wiφ‍'th two rows of concave and S-shaped ke♦<πyway on one or both §≥©©sides, or double snake keyway insid&↓e and outside;

Purchase Standard
The safest lock cylinder has been upgraded t♣©  o Class B and Class C. It iΩ♠"εs best to choose Clas♦±✔€s C when purchasing.
The first move: I used to buy a lock to judge theΩ≠‌ quality of the lock c×γylinder by the number of key teeth. It mainly dep↔£ends on the structure of the lock cylinder. Tγ&$♥he blade side column structure iβ€s often much better than the traditional marblesα₹ structure. When picking a lock, i©'€t is better to ask a professional teache→♣r for advice and then pick it according to the s↓&♠ituation.
The second move: pick the lock and ↑​α☆weigh two, one than the weight ♥®✘☆and two to look at the loc€☆k cylinder. The heavier the weiβλ"ght, the better the quality of the lock★♦©  cylinder, and the more beads in the lock↔↔♥≠ cylinder, the better the anti-t→$heft function.
The third trick: choose the lock cylinder to see ®₽®the color, and compare the color to see the workmδ"¥anship. The good quality lock cylinder♠" adopts electroplating treat↕Ωment, the surface is smooth and the color is​←α↓ bright. Among them, the ×☆dark yellow color is copper core,"α←∏ which is relatively strong and has go↔↑od anti-theft performance. The lock ÷ >Ωcore is dim in color aβ←α€nd zinc alloy is gray and has bubbles. Theσ∏∞ anti-theft performance is gene× λ≤ral.
The fourth trick: The anti-th‌★eft performance of the key is poo×&÷r when the key is insΩ​erted into the lock Ω∑×cylinder. After the key is half inser ®<αted, use 5 to 7 component force to rotate cloc< kwise or counterclockwise and contin₽γue to press the key into the loc♠γ∑•k port. The stuck key indicat¶↕Ωes that the lock cylinder has anti-theft♣€ performance. Poor, smoothly insert✘✘λ ing the lock cylinder in a half-rotation ​ state indicates that the anti-theft ±€effect is good.