bull‘s eye level  牛眼水准器

bull’s eye level  牛眼水准器; 圆水准器

bull-eye level  圆水准器

eye level finder  直视水平瞄准器; 直视水平指示器

eye level view finder  目视水准瞄准器

Eye-Level  眼光水平; 与眼睛对平

eye-level view-finder  平视式取景器

optical eye level finder  光学直视水平瞄准器

LEVEL level  水平

an eye for an eye  以眼还眼; 以眼还眼，以牙还牙

an eye for an eye and a tooth for a tooth  以牙还牙; 以眼还眼

eye and eye turnbuckle  两端均为螺丝眼的旋回紧扣

eye relief (=eye-point distance)  适眼距

eye relief，eye distance  眼衬距; 镜目距

eye to eye contact  视线接触

eyetoeye contact  视线接触

4-level frequency modulation (4-level FM)  四电平调频

bi-level programming model with two lower level models  一主多从双层规划

coupling mechanism between upper level and low level jet  高低空急流耦合