在专业技术方面有比较丰富经验的在职或离、退休人员；
Personnel who are still on their posts or retired have rich experience in the pallet speciality and technology;
有些专业技术方面的单词，有时长达几十个字母，只有本行业的专家们认识。
Some professional and technical aspects of the word, sometimes up to dozens of letters, only the knowledge of experts in the industry.
目前，编写3 - D程序在时间和专业技术方面所需的初始投入是非常高的。
The initial investment of time and expertise required to program 3-d is very high in today's world.
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