The major purpose of this paper is to research the service and maintenance technology of CT equipment under the existing technical condition in our country.

本论文的主要目的就是探讨在国内现有的技术条件下，对CT设备的维修、维护技术。

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Major characteristics and existing problems of these equipment are evaluated on the basis of operation practice.

通过生产实践，对高效浓密机的主要特点和存在问题进行了评价。

youdao

Business investment in the United States by both domestic and foreign firms, whether in the form of new equipment or facilities or the expansion of existing facilities, is a major engine of economic growth and job creation.

WHITEHOUSE: Executive Order 13577--SelectUSA Initiative