Bad business confusion lock point and anti-theft concept
In fact, as early as 1998, China has formulated relevant national mandatory standards for security door security, and has specified that the mechanical security door locks must meet the A or B standards. The A level is the ordinary protection level, and the B level is It is an advanced protection level. However, when the merchants promote the drink, they often do not talk about the protection level of their own product locks. They only emphasize how much their locks are. This is actually the difference between the lock points and the lock cylinders that intentionally confuse the security door. concept.
4 locks are enough
The function of the lock point of the security door is to prevent smashing, but the key to control the lock point expansion and contraction is the lock core. There are more lock points for any anti-theft door, but there is only one lock core, as long as the lock cylinder is opened, all The lock points can all be opened, so for the purchaser of the security door, it is the key to pay attention to the quality of the anti-theft lock cylinder. The lock cylinder is the core of the anti-theft lock. Generally speaking, the security door has a lock point on the top, bottom, left and right sides, that is, 4 lock points are enough.
Abuse of inferior door locks
The reason why countless nominal "security doors" will easily "fall off", often with manufacturers to save production costs, abused some low-cost inferior door locks, most security door manufacturers to buy from low prices to the community The locks, the quality of the steel plate of the lock body are not in line with the national standards, and some are not even steel plates at all. They are made of inferior materials such as cast iron plates or imitation steels, not to mention smashing, and some can be smashed by external force. open.
Some security door manufacturers even use single-row pin locks that are easily banned by thieves that have long been banned by national standards.
Lock grade standard
There are a lot of locks, and the price is often rising. In fact, the more the locks, the more expensive the security door is. It’s a good product when you buy it. If you buy it, you don’t want to give the manufacturer a clear indication of the level of the security door locks used. Is it the most important thing?
- Plano-concave cylindrical lenses are edged as circular shapes so they can easily be combined with other elements in an optical system. Lenses are supplied uncoated. Anti-reflection coatings are available. Please contact the Lambda`s sales teams for more coating information.
- Plano-concave cylindrical lenses provide uni-axial negative imaging for anamorphic beam expansion and a wide range of applications. These lenses may also be used as mirror blanks if a concave cylindrical surface mirror is required.
- Plano-concave cylindrical lenses are edged as circular shapes so they can easily be combined with other elements in an optical system. Lenses are supplied uncoated. Anti-reflection coatings are available. Please contact the Lambda`s sales teams for more coating information.
- Plano-convex cylindrical lenses are useful for line imaging or uni-axial magnification in a wide range of applications. Lenses are supplied uncoated. These lenses may be combined with other lenses to form complex imaging systems. Please contact the Lambda`s sales team for more coating information.
- Material: UV Fused Silica,UV grade CaF2, BK7A
Cylindrical Lenses,Cylindrical Power Lenses,Cylindrical Lenses Optics,Optical Density Filters
Lambda Research Optics ChangChun,LTD. , https://www.lambdachina.com