A portable drill or an electric chainsaw could save Labour, and make light of roughing out big boards.

便携钻机或是电动链锯能够节省体力，并使大块木板的粗加工化繁为简。

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This paper studys noise produced by portable electric drill on theory and experiment. It can help find methods of reducing portable electric drill noise.

从实验和理论上研究了手提电钻在工作时产生噪音的主要噪声源及其特点，为减少其噪音提供了依据。

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Mix the high infiltration epoxy ground coat and supplementary firming agent according to certain proportion and Sir The mixture evenly with the portable electric drill.

将高渗透环氧底漆和配套固化剂按比例混合，用手提电钻搅匀。

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