主要零件材料(Main parts and materials):阀体、阀盖的材料：Z41H-16Q可铸铁、Z41H-25Q可铸铁密封面的材料：Z41H-16Q不锈钢、Z41H-25Q不锈钢
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The abrasion of metallic parts and fire-resistant materials for circulating fluidized bed (CFB) boilers is one of the main causes of operation failures.
循环流化床锅炉中金属部件及耐火材料的磨损是造成其运行事故的主要原因之一。
The funds, materials, and equipment as needed to affect the prevention of air pollution of construction projects should be included in the overall planning of the main parts of these projects.
建设项目中大气污染防治所需资金、材料和设备，应当与主体工程统筹安排。
There is a high requirement for the derrick substructure of the ultra-deep well in structural form, layout of component parts and main materials.
超深井钻机井架底座在结构形式、构件布局、主体材料的选取等方面均有较高要求，常规的井架、底座主体材料难以满足超深井钻机特定的载荷和工况要求。
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