求翻译：我利用业余时间自学了铸造工艺和机械制图等专业知识，这些知识的补充和积累帮助我更好地掌握了铸造的生产技术，并能根据产品缺陷确定发生的原因，制定相应的解决方案。大大提高产品品质。是什么意思？

I used the spare time learning the casting process and mechanical drawing and other professional knowledge, which complement and help me to better grasp the accumulation of the casting production technology, and according to product defects to determine the cause, develop appropriate solutions. Grea

I use of free time learning the casting process and mechanical drawing, and other expertise, knowledge of the supplementary and accumulation of helping me to get a better grasp of the foundry production techniques, and can be identified according to the product defects, and the reasons for the occur

I used the spare time to study independently the casting craft and the mechanical drawing and so on the specialized knowledge, these knowledge supplement and the accumulation helped me to grasp the casting production technology well, and could according to the product flaw determine occurred the rea

My spare time learning the foundry and mechanical drawing and other expertise, these supplements and accumulation of knowledge help me better mastering the production technology of casting, and understand the product defects to determine the cause of, development of appropriate solutions. Greatly im

I used the spare time learning the casting process and mechanical drawing and other professional knowledge, which complement and help me to better grasp the accumulation of the casting production technology, and according to product defects to determine the cause, develop appropriate solutions. Grea