But in design of the large cross lines the vibration proof measures should be enhanced with combined measures.
但在大跨越线路设计中，需加强防振，采用组合防振措施。
They have the features of; new in design, simple in circuit, and with reasonable structure, well-vibration-proof and major technique norms have overtaken those importations.
它们具有设计新颖、电路简单、结构合理、防振性好，维修方便等特点，其运行可靠性和主要技术指标已超过原进口产品。
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