CAUTION: Do not use any sharp tools such as a crowbar or screwdriver on the rubber during installation. Sharp instruments can damage the flange face and cause possible leakage.

警告：在安装期间，不要采用任何尖锐的工具，如：撬棍或螺丝刀等。尖锐的工具可能会损伤法兰面，从而可能导致泄露。

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Exercise great care when using sharp tools in debris.

在废墟中使用锋利的工具时，要加倍小心。

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Chisels, screwdrivers and sharp tools should never be carried in the pockets. They should be carried in a toolbox, in a carrying belt (sharp or pointed end down); in a pocket tool pouch.

锉子、螺丝刀等尖利的工具一定不要装在口袋里携带，应把它装入工具箱、工具皮带或工具包袋里。

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These stone tools generally consisted of sharp flakes battered off a stone core, but early hominids also did more sophisticated flaking and retouching to sharpen and straighten their blades.

FORBES: Magazine Article

Its most far-reaching implications are still unknown but the tools have the potential to ease fuel shortages and ecological threats that are now in such sharp focus.

FORBES: Nanotechnology: Expanding Clean Energy and Easing Fuel Shortages

These early tools closely resembled the knives we use today, consisting of a piece of metal that was sharp on one end--the blade--and dull on the other--the tang.

FORBES: No. 1 The Knife