흑구

Black Ball

흑연

Black Lead, Graphite

흑연패킹

Graphite Packing

흑연페인트

Graphite Paint

흑연화

Graphitization

흘수

Draft, Draught

흘수계

Draft Gauge, Draught Gauge

흘수눈금

Draft Scale

흘수사다리

Draft Ladder

흘수표

Draft Marks