A little oblong packet, enveloped in blue paper, fell from one of the pockets of the greatcoat.
一个长方形蓝纸包从那厚大衣的一只衣袋里掉了出来。
Angle cut: to cut paper to special angles in order to avoid waste in the manufacture of enveloped.
斜角切：在制造信封时，把纸张作特别角度裁切，以减少损耗。
This paper introduced a new design method of rotor teeth profile and star-wheel teeth profile enveloped with multi straight lines in a single screw compressor.
介绍了多直线包络的单螺杆压缩机螺杆齿面母线和星轮齿型面的设计方法。
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