After 1949, the caves were declared historic monuments, and the steady erosion by wind and water was slowed down through judicious tree planning and the construction of protective barriers.

1949年后，这些洞被宣布为历史古迹，通过远见卓识的植树计划和防护屏障建设，风蚀和水蚀的速度慢了下来。

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In the construction of steel pipe scaffold on electric welding machine, vibrator and other electrical equipment should be placed in dry wood, operators shall wear insulating protective equipment.

在钢管脚手架上施工的电焊机、振捣器等用电设备应放置在枯燥的木板上，操作人员应穿戴绝缘的防护用品。

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In this paper, a new technique of protective layer excavation of horizontal foundation was expounded and applied to the construction of Lijiaxia hydropower station.

本文是水平建基面保护层一次爆破开挖新技术在李家峡水电站工程的应用实例。

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The people offered lower amounts include some who have already received other compensation for their illnesses, including shares of a civil settlement for thousands of firefighters, police officers and construction workers who had sued over the lack of protective equipment at ground zero.

WSJ: 9/11 fund makes 1st payments to sick responders