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关注:1
2013-05-23 12:21
求翻译:Depending on local conditions,the front abutment is first felt as far as 500 ft outby the face.However,the increase in magnitude at this tims is small.It picks up slightly at a distancebetween200 and 150 ft outby the face,increases rapidiy when the face is between70 and 50 ft away,and reaches peak adutment pressure 3 t是什么意思?![]() ![]() Depending on local conditions,the front abutment is first felt as far as 500 ft outby the face.However,the increase in magnitude at this tims is small.It picks up slightly at a distancebetween200 and 150 ft outby the face,increases rapidiy when the face is between70 and 50 ft away,and reaches peak adutment pressure 3 t
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