double-section harrow 双列耙
double-section turbodrill 复式涡轮钻具
Double section security cabinet 双节保密柜
double-web section 双腹式断面
Double Period Section Steel 复合周期断面钢材
double-skinned door section 复合门板
double-welled cylinder section 双层壁气缸组
double differential cross section 二重微分截面
double section
双节
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Double section gas occurrence boiler gasification efficiency and thermal efficiency than single sections of furnace are high, there is two gas exports, and output of gas calorific value of different.
双段煤气发生炉气化效率和热效率均比单段式炉高，有上下两个煤气出口，可输出不同热值的煤气。
youdao
On the double helix that comprised the Os in Google, a small section of a strand crossed another at the wrong spot.
WSJ: A Holiday Card From Google
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