circular saw

n rotating metal disc with a serrated edge used for cutting wood, etc 圆锯.

cine-projector, cineast, cinema, cinematic, cinematographer, cinematographic, cinematography, cinnamon, cipher, cipher (also cypher), circa, circle, circlet, circuit, circuit training, circuit-breaker, circuitous, circuitously, circuity, circular, circularity, circularize, -ise, circulate, circulation, circulatory, circumcise, circumcision, circumference, circumflex, circumlocution, circumlocutory, circumnavigate, circumnavigation, circumscribe, circumscribed, circumscription, circumspect, circumspection, circumspectly, circumstance,