Safety rules are your best tools.
安全法规是最好的安全工具。
It is an important task to improve the safety and portability of electric tools.
如何提高电动工具的安全性、可移动性，成为一项极具意义的工程。
Machine Tools - Iron Workers - Safety Requirements for Construction, Care, and Use.
机床。钢铁制品。制造、维护和使用的安全要求。
Machine Tools - Iron Workers - Safety Requirements for Construction, Care, and Use.
机床。钢铁制品。制造、维护和使用的安全要求。
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