direct current-direct current DC-DC converter  DC-DC变换器

direct or direct or held covered  直接承保或直接或暂予承保

direct teemingtop pouring Direct tempering  直接回火

direct-current direct-current converter  直流换流器; 直流-直流变换器

average tidal current velocity during flood tide or ebb tide  潮段平均流速

spring tide and neap tide  大、小潮

tide and half tide  半续湖

’Direct Through’of B type  B类直通

0-direct union  0-直并

1 000 kV ultra-high voltage direct current  1000kV特高压直流

1 kV cables of direct buria  4丁酸苯酯; 1kV直埋电缆; 累加器; 储能电路; 存储器; 蓄电池

110kV direct step-down rectifying equipment  110kV直降式整流装置

135 MW direct air cooling unit  135MW直接空冷机组

2D direct drive  平面直接驱动

2D direct location  二维直接定位法

2D direct-drive  平面直驱

351 alternating and direct square-waves argon arc welding machine  351型交直流方波氩弧焊机

351 alternating and direct square-waves argon are  351型交直流方波氩弧焊机; 通光孔径

3-D direct current survey  救护飞机(Airam bulances); 三维直流电法