Circular rod level 圆盒水准器

level rod 水准测杆

oil level rod 量油杆 ; 油位测量杆 ; 量油位杆

four-level laser rod 四能级激光棒

three-level laser rod 三能级激光棒

self-reading level rod [测] 自读水准尺 ; 自读式水准尺

fluid level gauge rod 测定液位的指示杆

four level laser rod 四能级激光棒

oil l level rod 量油杆