934689 EQC external quality control 38 934695 EQC EQuilibrium Criterion 7 934696 EQC Environmental quality criteria 2 934691 EQC equivalent drug content 2 934694 EQC Earthquake Commission 1 934693 EQC Ecological Quality Class 1 934702 EQC edge quantum computing 1 934701 EQC effective quadrupole center 1 934692 EQC Electron Quick Calc 1 934697 EQC Electronic Quality Control 1 934700 EQC equatorial cone cell 1 934699 EQC equilibrium change 1 934698 EQC equilibrium constant 1 934704 EQC equivalent circuit model 1 934703 EQC equivalent concentrations of the corresponding positive reference substances 1 934705 EQC equivalent QC 1 934690 EQC experimental quantum chemistry 1