This means which the speaker is talking about an alternative that did not take place, but ought to have -- a kind of the subjunctive. When the intent will be to express that it did take place, and also to approve of that, then it may be worded as: 目前我国智能锁市场正规智能锁产品主要有智能锁传统厂商、国际家电巨头、国内智能科技品牌这三类。 https://angeloupzai.bluxeblog.com/68661566/how-much-you-need-to-expect-you-ll-pay-for-a-good-lawyer-in-dha