secondary containment meaning in Chinese

堆二次安全壳
二级安全壳
外壳安全壳

Geosynthetic barriers - characteristics required for use in the construction of liquid waste disposal sites , transfer stations or secondary containment ; german version en 13492 : 2004
土工合成阻挡层.液体废物处理地点转换站或二次容器
Geosynthetic barriers - characteristics required for use in the construction of liquid waste disposal sites , transfer stations or secondary containment
土工合成阻挡层.液体废弃物处置场所传送站或二级容器结构中使用的阻挡层的特征要求
Paved secondary containment , waste water collection and biological treatment systems for pollution prevention . pressurised fire water system including dual diesel driven high capacity pumps with automatic tart on demand , and monitors in all operating areas
时，阀门打开向火炬泄放气体，火炬处设有水封、阻火器和电点火系统，蒸汽在此系统完全燃烧后达到环保要求的排放标准。