hem button是什么意思

用法例句

The stitch structures,properties and uses of sweaters bottom and cuff are classified discussed,and their notations are plotted.

对羊毛衫下摆及袖口的组织结构、性能及用途进行了分类论述，并给出了编织图。

To form a part with multiple bent angles,a bending die with upper and lower swaying blocks are used.

对多弯曲角零件 ,采用上下摆块式弯曲模结构 ,先摆动下摆块 ,待工序件弯曲至一定阶段时 ,上摆块与下摆块再同时摆动至下极点 ,一次即可成形多弯曲角零

Magnitude deviation and station correction value of Dafeng borehole seismograph;

大丰地震台井下摆震级偏差及台站校正值