Abstract: the historical block protection 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。

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The good, professional stainless steel chemical-specific pumps, automatic return systems, the pump-block protection 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。

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In this paper, the present some historical block protection mode are summarized, and analyzes its successful respectively way, the hope can provide some reference for the related department.

本文对当下的一些历史街区保护模式进行了总结，并分别分析了其成功的方式，希望可以为相关部门提供一点参考。

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The U.S. Senate is preparing to vote on legislation that would delay or block the Environmental Protection Agency from imposing carbon dioxide restrictions on the U.S. economy.

FORBES: The Senate's EPA Vote Will Help Determine Our Economic Future

In 2008, California sued the U.S. Environmental Protection Agency for trying to block its enactment of tough new rules on tailpipe emissions.

FORBES: With Driverless Cars, Once Again It Is California Leading The Way

She pointed out that the Children's Internet Protection Act already requires libraries to block net content that is harmful to children.

BBC: Many schools have already banned social network sites