Middle East & West Asia中东地区、西亚 Multiple Employer Welfare Arrangement (Group Employee Benefit Plan)多个用人单位安排员工福利福利计划(集团) Modified Esau-Williams AlgorithmEsau-Williams修正算法 Motor and Equipment Wholesalers Association电机和设备的批发商协会 Multiple Employer Welfare Associations雇主福利协会的多重