Spirillum A helically shaped bacterium.螺旋菌:一种螺旋形的细菌.Helically wound multi - filar cables and braids now predominate.多股绞绕与编织在当代是占优势的.What is a wire rope - consists of a number of wire strands formed helically a central ax...
它减少了气锁的机会.This reduces the chance of vapour lock.基本装置: 气锁的回转阀,低压大风量机.Basic device: An air - lock rotary valve and a high - volume and low pressure blower.膨胀节是防泄漏的,带有疏水,且与相连的设备之间具有气锁密封性.Expansion joints are leak proof and...