Inner upsetting technology for thin wall drilling pipes was used in Series SQ high strength wire line drilling pipes.
研究开发成功的SQ系列高强度绳索取心钻杆首次采用了薄壁钻杆内镦粗技术。
This paper introduces the application of external prestress technology with high strength wire for strengthening and renovating R.
本文介绍了采用高强预应力筋的体外预应力技术在结构加固中的应用。
This paper introduces the application of external prestress technology with high strength wire for strengthening and renovating R.
本文介绍了采用高强预应力筋的体外预应力技术在结构加固中的应用。
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