... special arm and hand signal ==> 特种手势信号 special asphalt ==> 特种沥青 special assembly systems ==> 专用组合系统 ...
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特种石油沥青 special petroleum bitumen
特种煤焦沥青 [材] special coal tar pitch
特种路用沥青 special road oil
特种沥青
Special asphalt
以上为机器翻译结果，长、整句建议使用 人工翻译 。
以新疆小西沟、风城两种油砂为原料，利用甲苯抽提制取的油砂稠油研制开发高价值的特种沥青产品。
Tar sand oil was extracted from the Xinjiang tar sands and some kinds of asphalt products with special uses and higher value were prepared from the said oil.
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