Unless specifically authorized by site management, contractors will not remove hazardous or non-hazardous waste materials from the site.
除非现场管理人员特别授权，否则承包商不得从现场中移走危险或非危险废弃材料。
An authorized inedible rendering plant shall be of solid construction, with interior finishes of smooth, hard and impervious materials capable of being cleaned.
获得授权的不可食用产品提炼厂应当采用坚固结构，室内装修使用平滑、坚固和不可渗透的材料，并且能够进行清洁。
So is the use of notes or other materials, unless explicitly authorized.
除非经过许可，同样也不允许使用笔记和其他材料。
These secret audio and video recordings must be securely kept. The play of these materials has to be authorized by the leaders and the extension of the audience is strictly controlled.
涉密内容的录音带、录像带要妥善保管，在使用播放前需经领导同意并严格控制收听收看范围。
These secret audio and video recordings must be securely kept. The play of these materials has to be authorized by the leaders and the extension of the audience is strictly controlled.
涉密内容的录音带、录像带要妥善保管，在使用播放前需经领导同意并严格控制收听收看范围。
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