upper confining bed

upper dental bed

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

upper ridge (upper-level ridge)

upper trough (upper-level trough)

upper-air chart (upper-level charty)

water diversion from the upper Yangtze River in the south to the upper Yellow River in the north

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

1221 upper working face

2×2 Upper Triangular Operator Matrixes

3-D upper-limb forces