Abstract: the historical blockprotection is instantly many people care about, and the rapid urban renewal rate has a serious threat to their existence.
摘要：历史街区的保护是当下很多人关心的问题，过快的城市更新速度已经严重的威胁到了它们的存在。
2
The good, professional stainless steel chemical-specific pumps, automatic return systems, the pump-blockprotection function, flow stability, durability, spraying the amount of precision.
配置优良、专业的不锈钢化工专用泵，自动回流系统、卡泵保护功能、流量稳定、耐用、喷涂量精确。
3
In this paper, the present some historical blockprotection mode are summarized, and analyzes its successful respectively way, the hope can provide some reference for the related department.