Do not stand a ladder on loose material or lean it against fragile material.

不要将梯子安放在松软或靠在易塌的物件上。

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Remove rust, mill-scale and other loose material by abrasive blasting or power tool cleaning.

用喷砂或其他电动工具除去铁锈、氧化皮等。

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The coating surface must not have the fat, the dust dirty and the loose material, the newly built wall needs fully bone dry.

需上漆的表面要无油脂、尘污和松散物质，新建的墙壁需充分干透。

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Hecla has received approval from MSHA to remove the loose material from the shaft, said Phillips S. Baker Jr.

FORBES: Hecla Officials Anticipate Clean-Up Of Mine Shaft Can Begin In Few Weeks

Food inspectors, air-traffic controllers, specialists who track down loose nuclear material wouldn't get their paychecks.

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Asphalt shingles ( the most common roofing material in the U.S.) can become loose, cracked, be blown off by the wind or be damaged by hail.

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