The lock cylinder adopts a n  umber of anti-theft technologies and a variety ∑¶π of special-shaped ant✘≈®✘i-pulling bullets toΩΩ​ prevent technical op<→ening. With the unique ✘♥★♣structure design of bullets and blad®&es, it has high safety performance of pr>₩eventing technical opening. The lσ&§ock container is equipped wi∏γ↕↕th precision number marble •®Ωand special-shaped marble s•←γπtructures, which will be autom​Ω≤atically locked when the number marble a≈₽∏♣nd special-shaped marble  ±"must be pulled at the same time during the techni↕≥¶ cal opening, thus making the∏₹© technical opening fail. Thα™±↓e lock cylinder uses a variety of speci γal-shaped marbles and multip​π ‍le combinations, which•ε can compile up to billions of key numbers, t•&±hus realizing zero-opening of regions (one in 1↓™6 million). The lock cylinder‍™∑ is added with a side-to-side pressα÷≥≥ure-type side post locking pin device, whi $α♥ch greatly improves the ability ★☆•£to prevent violent torsion.

Anti-theft standard
The security level of anti-∏αα≤theft locks is divided into A, B §☆and C levels according ↓↕to national standards.
1. Class A lock cylinder, prevent t↑δ↓echnical opening ≥ 1 ✔$× minute, anti-drilling ≥ 10 minuteγ §s, anti-sawing ≥ 5 minutes,≤€β™ anti-prying ≥ 10 mi<'γπnutes, anti-pulling ≥ 10 min↕€utes, anti-impact ≥ 10 minutes.
2. Class B lock cylinder, prevent¥∞←ing technical opening ≥ 5 minutes, anti-dr€∑βilling ≥ 15 minutes, anti-sawin<♦g ≥ 5 minutes, anti-prying ε✔®™≥ 15 minutes, anti-pulling ≥ 1₩∑Ω5 minutes, and anti-impact ≥ 15 minutes.
3. Class C lock cylinder, preventing ©♥technical opening ≥ 10 minutes, anti-dri™δ&lling ≥ 30 minutes, anti-sawin∏↓¶♠g ≥ 30 minutes, anti₽←-prying ≥ 30 minutes, anti-pulling '≠≥ 30 minutes, and anti-impact ≥ 30 minutes.

Classification
Class A: The key is flat or c ₹✘rescent, with a row of concave keyway on one side↕✘§‌ or both sides or a convex <ε®keyway on four sides of the ★'  cross;
Class B: The key is flat ±♥♣or crescent, with two rows of≤π ÷ concave keyholes or cylindrica♠₹l multi-point concave k'★δeyholes on one or boε≥₹th sides;
Class C: The key is flat, with t©∑λ$wo rows of concave and&<÷ S-shaped keyway on £¶↑≈one or both sides, o↑γr double snake keyway ins✔≥&‌ide and outside;

Purchase Standard
The safest lock cylinder has been up✘∏™graded to Class B and Class C. It is best to ch₽ ׶oose Class C when purchasing.☆¥↓
The first move: I used to buy ≥←a lock to judge the quality of ε₩the lock cylinder by the number of key tee φth. It mainly depends on tλ<he structure of the lock cylinder. The÷±∏₽ blade side column structure is often mu• ​ch better than the traditional marbl$‌ ≥es structure. When pickingγδ a lock, it is better to ask a professional te₩σ≠acher for advice and then pick it according t↔§o the situation.
The second move: pick the§βδ lock and weigh two, one than the"♠∏© weight and two to look at the l✔ ock cylinder. The heavier the weiπ♦‌ght, the better the "​γ©quality of the lock cy©∑↓linder, and the more beads in the lock cyli>'nder, the better the anti-theft function.
The third trick: choose the lock cylinder to≥π↑ see the color, and comp§↓are the color to see the workmans≤→"hip. The good quality lock cylin↕Ωder adopts electroplating←✔♦ treatment, the surface is smooth and t‌♥£he color is bright. Among them, the dark yellow ₩™color is copper core, which is relatively st→σrong and has good anti-thef↔Ωt performance. The lock core is dim in→‍↕∑ color and zinc allo¶₽y is gray and has bubbΩγles. The anti-theft performa→✔₽€nce is general.
The fourth trick: The anti-theft performance o$>f the key is poor when the k$±∏♥ey is inserted into the lock cylind$βer. After the key is half inserted, use α♥5 to 7 component force to rotate clockwise o♠ r counterclockwise and continue to  ​press the key into th↕ e lock port. The stuck key indi€↔δαcates that the lock cylinder ₹Ωhas anti-theft performance. Poor, smoothl∏×∏y inserting the lock cylinder in a half-rotation <←↔state indicates that the anti-theft effect is g←" ↔ood.