手持式双目视力检查器

Left Hand AP & Oblique

Maackia tenuifolia Hand.-Mazz.

ahead of time【科技】;before hand【科技】;in advance【科技】

Machilus leptophylla Hand.-Mazz

hand tools for UNSCREWING threaded members

hand crab (drum winch)

down hand welding

Paulownia rehderiana Hand.-Mazz.