China Naming Network - Solar terms knowledge - Which is better, a straight arm door opener or a splayed door opener?
Which is better, a straight arm door opener or a splayed door opener?
The eight-character door opener is good. Security and cost performance.
1, security. The eight-character door opener has eight locks, so you can't get in without the owner's authentication, while the straight-arm door opener has only one lock, so the security is not strong.
2. cost performance. The eight-character door opener costs 2436 yuan, which is practical, while the straight arm door opener costs 3000 yuan. So the eight-character door opener is good.