Three types of ceramet protection tubes for thermocouples weredeveloped by way of powder metallurgy .
采用粉未冶金工艺,研制出三种金属陶瓷热电偶保护管:MCPT-4型(Mo-Al_2O_3-Cr_2O_3-TiO_2)在高温盐浴炉中使用寿命超过 1 400 h,MCPT-6 型(Mo-Cr-Al_2O_3-Cr_2O_3-TiO_2-MgO)在铜液中使用寿命不低于 1 000 h,MCPT-3型(Mo-MgO-Cr_2O_3)多孔管,在LD转炉中可连续使用 121炉。
In recent years,the cable protecting tube has witnessed rapid development and its materials are of a great variety and different properties.
近年来,电缆保护管行业发展迅速,管材种类繁多,性能各异。
The diameter of FRP cable protective pipes varies from 50 to 200 mm and the thickness of the pipe wall is from 2 to 12 mm.
玻璃钢电缆保护管直径d为(50~200)mm,管子壁厚t为(2~12)mm,变化范围很大。
Aiming at the serious casing corrosion of water injection wells,one chemical agent is injected into the annular space of the tubing and casing,and forms a ring-shape elastical seal plug,then the suitable corrosion control agent and bactericidal agent are injected,used as a casing protection fluid.
针对注水井环空油套管腐蚀严重的问题,在油管套管环空的某一指定位置使用化学剂形成一个环状粘弹性密封塞,注入适合本油田的防腐剂和杀菌剂作为套管保护液,对油套环空起到良好的保护作用。
Advancing in depth on the Collective Forest Property Right system,will positively improve on the forest resource conservation and management,simultaneously,it will bring out new issues and mission of the forest resource management and conservation.
集体林权制度改革的深入推进,将对森林资源保护管理产生积极的推动作用。
In combination with the experiences of water resources administration of recent years, the measures taken for the management and protection of the large karst springs are proposed.
本文着重论述这１９处岩溶大泉污染类型及污染途径，对主要污染物及污染原因进行分析，并结合近年来的水资源管理经验，提出了对岩溶大泉的管理保护措施。
non-metallic protecting tubes for thermocouples
热电偶用非金属保护管
ceramet protective pipe for thermocouple
金属陶瓷热电偶保护管
Temporary Rules of the Preservation and Administration of Cultural Relics
《文物保护管理暂行条例》
conservationists saw the need to protect the environment and animals,
保护管理论者发现了保护动物和环境的必要性。
The Protection and Management Pattern of Lake Biwa in Japan and Relevant Suggestions for Jiangsu Province
日本琵琶湖的保护管理模式及对江苏省湖泊保护管理的启示
Capillary: Brass or stainless steel capillary with s/ s protector.
▲ 毛细管：铜或不锈钢毛细管，不锈钢保护管。
Capillary:Brass or stainless steel capillary with s/s protector.
毛细管：铜或不锈钢毛细管，不锈钢保护管。
In recent years, an administration system for marine environmental protection has been gradually set up: State environmental protection departments are in charge of marine environmental protection for the whole country;
近年来，中国逐步建立了海洋环境保护管理体制。 国家环境保护部门主管全国海洋环境保护工作；
Investigation and Countermeasures on the Conservation and Management of Coastal Protection Forests in China;
我国沿海防护林保护管理情况调研与对策思考
The electrical isolation of cathodic protected pipelines
阴极保护管道的电绝缘标准
ambient light filter
(阴极射线管) 保护滤光器
The Regulation on Protection of Undersea Cable Channel
海底电缆管道保护规定
Emergency Management and Protectio
紧急情况的管理和保护
reef protection and management strategy
鱼礁保护和管理策略
the competent department of environmental protection.
环境保护行政主管部门
Vertical pipe shield and underwater pile-foundation protection frame for wellhead
垂直护管水下桩基式井口保护架结构
Office of Legal Protection of the Archdiocese of San Salvador
圣萨尔瓦多大主教管区法律保护处（法律保护处）
State environmental protection departments are in charge of marine environmental protection for the whole country;
国家环境保护部门主管全国海洋环境保护工作；