All valves to be suitable for double block and bleed service.
所有阀门需有双堵塞和双排放功能。
The paper briefly summarized the current situation and advancement of double block copolymer as pigment dispersant for water-borne coatings.
简要概述双嵌段共聚物作为水性涂料用颜料分散剂的现状及进展。
Product notes: We are developing a double block and bleed design seating arrangement for applications which require verifiable positive shut off.
产品说明：我们正在开发双重阻塞和排放结构的阀座排列设计，用于要求能够证明确实关断的应用环境。
Double-block ballastless track applied on PDL is a new track structure. It is a low maintenance durable track structure with high stability, high geometric regularity and uniform track stiffness.
双块式无碴轨道是一种适用于客运专线的新型轨道结构，它具有高平顺性、高稳定性、刚度均匀性好、结构耐久性强和少维修的特点。
This article introduces the construction technological process of a new type of ballastless track, viz. the double-block track and performs a cost analysis of the same.
介绍一种新型无碴轨道形式即双块式无碴轨道的施工工艺过程，并进行造价分析。
This article introduces the construction technological process of a new type of ballastless track, viz. the double-block track and performs a cost analysis of the same.
介绍一种新型无碴轨道形式即双块式无碴轨道的施工工艺过程，并进行造价分析。
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