The days are beginning to lengthen out.
白昼开始变长了。
It is put out that the injector and extruder are strengthened on the surface by laser surface alloy to improve its high temperature abrasion and lengthen life of the injector.
提出了采用激光表面合金化的方法对注塑机和挤出机螺杆表面进行强化，以提高其抗高温粘着磨损性能，延长注塑机使用寿命。
The winter days are beginning to lengthen out.
冬天的白昼开始长起来了。
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