That means the IGBT-based switch unit switches from one position to the other depending from the fillingstatus of the buffer and the operation mode of the load.
这意味着，依赖于缓冲器的填充状态和负载的操作模式，基于IGBT的开关单元从一个位置切换到另一位置。
2
Conclusion: The masticatory efficiency of 7~9 year-old children was negative correlated with caries status index, and filling of decayed teeth can significantly increase masticatory efficiency.
结论：7~9岁儿童咀嚼效能与患龋状况存在直线负相关关系，龋病充填治疗可显著增加患龋儿童的咀嚼效能。
3
The theoretical model and research status of the simulation of powder injection molding filling process are reviewed. Their merits and demerits are analyzed and compared.