Project supported by a Grant for Key Research Items in "Climbing" Program from the Ministry of Science and Technology of China (Grant no.).
国家科技部攀登计划重点研究项目基金(批准号：)资助的课题。
According to the concrete conditions of China, this paper puts forward the key research items of soil and environmental problems in the country.
根据我国的具体情况，提出了在我国开展土壤与环境问题研究的重点课题。
Introduction was made to the key test items and technical requirements of contactor type relay reliability research.
介绍了接触器式继电器町靠性研究的重点试验项目及技术要求。
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