직열흐름터빈

Series Flow Turbine

직장

Foreman

직재

Straight Timber

직접강도계산

Direct Strength Calculation

직접역전장치

Direct Reversing Gear

진공계

Vacuum Gauge

진공관

Vacuum Tube, Vacuum Valve

진공차단기

Vacuum Breaker

진공청소기

Vacuum Cleaner

진공펌프

Vacuum Pump