’Direct Through’of B type

0-direct union

1 000 kV ultra-high voltage direct current

1 kV cables of direct buria

110kV direct step-down rectifying equipment

135 MW direct air cooling unit

2D direct drive

2D direct location

2D direct-drive

351 alternating and direct square-waves argon arc welding machine

351 alternating and direct square-waves argon are

3-D direct current survey

3D direct manipulation

4 stages of direct air-cooling development

4100 direct injection diesel engine

4460 Direct-reading spectrometer

4-aminopyrine direct colorimetric method

600MW direct air cooling unit

a direct interpolation method

a direct solution method