Human Leukocyte Antigen(人)白细胞抗原 Heavy Load Assessment重负荷评价 Helicopter Landing Area直升机降落区 High Level Architecture高水平的建筑 histocompatibility locusantigen　 High Layer Compatibility高层兼容性 Higgins Lectureship Award (AISC)希金斯Lectureship奖(2003) Histocompatibility Leukocyte Antigen组织相容性白细胞抗原 Heavy Lift Aircraft起重飞机 Horizontal Line Array横线的数组 Hydraulic Launch Assist水压发射协助 High-Level Analog高级模拟 High Level Assembly高水平的装配 Historical Labor Application历史的劳动 Hyperbaric Lighting Assemblies高压氧照明组件