The nanocrystalline AB _ 5 type rich - lanthanum rare earth hydrogen storage alloys were prepared by double - roller rapid quenching.

用双辊快淬工艺制备了纳米晶AB_5型富镧稀土贮氢合金.

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It is composed of four tracks peel - roll, double - roller ( printing, cutting ), molding and reclaiming material.

本机由四道轧皮和双辊 ( 印花 、 切割 ) 成型、余料回收等机构组成.

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This article introduces the structural characteristic, machining and assembling of double - roller guiding ball valve.

阐述了双滚轮导杆球阀结构特点 、 加工及装配方法.

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The present invention relates to double roller continuous thin - belt casting technology continuousbelt casting method.

本发明涉及双辊薄带连铸工艺中的开浇技术.

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