可提高木工划线工作效率和尺寸精确度并能减轻劳动。
The work efficiency and the dimensional accuracy of scribing of the woodworker can be raised, and the work can be reduced.
当然，根本上解决问题还是要提高挺杆的材质和尺寸精确度。
Of course, the fundamental solution to the problem or to improve the tappet of the material and size accuracy.
但它是以精确度为代价的，因为墨卡托投影使那些靠近极点的国家看上去比真实尺寸要大的多。
But it comes at the expense of accuracy - the Mercator projection makes countries close to the pole look much bigger than they really are.
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