The causes producing wall thickness difference in a same pierced shell are expounded and the influences of piercing, rolling and mandrel drawing on the difference are studied.
阐述了穿孔毛管产生同管壁厚差的原因，研究了穿孔和轧管工艺对钢管同管壁厚差的影响。
Researchers have been attempting todevelop such coatings for decades, but existing methods for depositingthem—such as spraying—have trouble producing the correct thickness.
研究人员几十年来一直在尝试研发这种新型涂料，但是现有的涂覆方法，比如喷涂法，都很难得到合适的厚度。
The deviation of the particleboard's thickness is the crux of the matter for the quality of the board sanding; the particleboard's thickness is controlled strictly during the producing course.
刨花板厚度偏差是影响砂光质量的关键因素，生产过程中必须严格控制刨花板厚度。
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