1) duty on the second line
二线值班
2) the second pipeline
二线
3) Gas Pipeline II
陕京二线
1.
After long distant West-East Gas Pipeline and Shaanxi-Beijing Gas Pipeline II with high pressures and large diameters were constructed and put into operation successively,some new acquaintanceship and experience have been obtained in domestic high pressure and large diameter pipeline material selection.
随着西气东输和陕京二线等国内高压、大口径长输输气管道的相继建设,对于国内高压大口径管道的管材选用有了新的认识。
4) Vac. side cut 2
减二线
1.
side cut 1 and Vac.
与减一线生产催化原料相比,其收率、操作条件、产品性质等只是减一线、减二线有所差别。
5) two-lines
二线模型
1.
Adopted two--lines model, the mathematics relationship of structure activity has been established by multiplex step regressions.
本文以含氟苯并三唑类农药为研究对象，应用Ｑ型聚类分析对农药进行定量分组，采用二线模型，按照逐步回归建立构效关系的数学模型，设计出新的高效农药。
6) second-line chemotherapy
二线化疗
1.
Second-line chemotherapy in sensitive or refractory small cell lung cancer after primary treatment with platinum and etoposide;
足叶乙甙联合铂类一线化疗后复发的小细胞肺癌二线化疗的临床研究
2.
Paclitaxel-based regimens as second-line chemotherapy for patients with advanced gastric cancer;
7%)为铂类治疗失败的患者,既往治疗方案对紫杉醇二线化疗疗效无明显影响。
参考词条
补充资料：二线
①战争中的第二道防线。②比喻不负有直接领导责任的地位：退居～。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。