monolithic track bed；solid bed；integrated ballast bed；monolithic concrete bed

annual temperature difference between track bed slab and bed plate

bed-by-bed analysis

Circulating fluidized bed wity low velocity fore postied branch bed

coal bed and gas bed

ebullated bed ebullating bed

ebullated bed reactor ebullating bed reactor

ebullating bed ebullated bed

ebullating bed reactor ebullated bed reactor

moving packed bed and fluid bed

A C inert-arc welder

AC inert-arc welder

AC tungsten inert gases welding

activating tungsten inert-gas welding

activating tungsten inert-gas welding with direct current straight polarity mode

Activating-tungsten inert-gas welding

active-tungsten inert-gas welding

alterative current tungsten inert gas welding

alternating current activating tungsten inert-gas welding