double-line

The paper discussed the wiring pattern,protection and characteristics of electified section post with double line quadripole wiring.

论述了电气化分区亭的接方式、保护及其特点。

This paper reviewed the chromosomal engineering in the aspects of double diploid, hetero-additive line, hetero-replacement line, exchange line, monosome one incomplete chromosome systems.

对植物染色体程与二倍体、异附加、异代换、易位、单体与缺体统进行了综述。