为了使凿刀和刨子好用且安全，必须保证他们的刃足够锋利。
Keeping a sharp edge on chisels and plane irons is absolutely necessary for the successful and safe use of these tools.
凿耕法和铧式犁翻耕法在短时间内使二氧化碳的排放增加。
Chisel and moldboard plowing increased carbon dioxide emissions for a short time.
在西部，1900年代的经典工艺美术设计主题正在复苏，使手工凿板岩风格流行的选择。
Out west, classic 1900s Arts and Crafts design themes are enjoying a revival, making hand-hewn SLATE styles a popular choice.
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