slate pencil

n.

石笔；

Silicosis in slate pencil workers: I. An environmental and medical study.
Rapid progression of silicosis in slate pencil workers: II. A follow-up study
Growth, Regeneration, and Damage Repair of Spines of the Slate-Pencil Sea Urchin Heterocentrotus mammillatus (L.) (Echinodermata: Ec...
Non-occupational exposure to silica dust in vicinity of slate pencil industry, India
Silicosis in slate pencil workers. A clinicoradiologic study.
Ventilatory functions and sputum cytology in slate pencil workers silicosis.
Reproduction of the Slate Pencil Sea Urchin, Heterocentrotus mammillatus (L), in the Northern Red Sea
Sponge and slate-pencil holder
Occupational exposure to dust in slate pencil manufacture
Slate-pencil sharpener