double double iron

double γ-ray means

X ray double crystal diffraction

x-ray double crystal analysis

X-ray double crystal diffraction

X-ray double crystal rocking diffraction

X-ray double-crystal diffraction

X-ray double-crystal diffractometry

gamma ray (=γ-ray)

infrared ray testing

ray-testing

X ray testing

x ray testing x

X-ray testing

γ-Ray testing

“double-seat double-vote” system

ball mill with double-inlet and double outlet

cationic double-chamber double-layer float bed

COAL PULVERIZER WITH DOUBLE INLET AND DOUBLE OUTLET