聚异丁烯 - 百度百科
网页聚异丁烯（Polyisobutylene，PIB）是由异丁烯经正离子聚合制得的聚合物，其分子量可从数百至数百万。 它是一种典型的饱和线型聚合物。 分子链主体不含双键，无长支链存在，其结构单元为-（CH2-C(CH3)2)-，其中无不对称碳原子，并且结构单元以首一尾有规序列连接。
聚异丁烯PIB的分类以及应用 - 知乎 - 知乎专栏
网页2024年1月9日 · 聚异丁烯 (简称PIB)是一种无色、无味、无毒的粘稠或半固体物质，具有良好的耐热、耐氧、耐臭氧、耐化学品及耐侯、耐紫外线、耐酸、耐碱性能，其体积电阻率高，膨胀系数小，不含电介质有害物质，电绝缘性优良，裂解无残炭等特点，除广泛应用于润滑油 ...
Gross domestic product - Wikipedia
网页Economics. Gross domestic product (GDP) is a monetary measure of the market value [2] of all the final goods and services produced and rendered in a specific time period by a country [3] or countries. [4][5][6] GDP is often used to measure the economic health of a country or region. [3]
GDP (current US$) | Data - World Bank Data
网页REPORT FRAUD OR CORRUPTION. GDP (current US$) from The World Bank: Data.
List of countries by GDP (nominal) - Wikipedia
网页Gross domestic product (GDP) is the market value of all final goods and services from a nation in a given year. [ 2 ] Countries are sorted by nominal GDP estimates from financial and statistical institutions, which are calculated at market or government official exchange rates. Nominal GDP does not take into account differences in the cost of ...
What is pebibyte (PiB)? | Definition from TechTarget
网页A pebibyte (PiB) is a unit of measure that describes data capacity. The prefix pebi was created as part of the binary system for measuring computing and storage capacity, which is based on powers of two.
Press Information Bureau
网页Latest Press Releases. More +. List of grievances redressed on CPGRAMS released by Department of Administrative Refo... Department of Administrative Reforms and Public Grievances released list of Grievance... India is now seen as a preferred security partner in Indian Ocean Region; Navy playin... India’s First Fashion Forecasting Initiative ...
Data - OECD
网页How to apply effective governance to harness the benefits of A.I. and mitigate its risks. Analysis and insights for driving a rapid transition to net-zero while building resilience to physical climate impacts. Standards and guidelines for development co-operation with concrete examples of their implementation.
All Release:Press information Bureau
网页5 天之前 · Ministry of Labour & Employment. Government of India Invites Platform Aggregators to Register themselves and their Platform Workers on e-Shram Portal.
Press Release:Press information Bureau
网页6 天之前 · Posted On: 18 SEP 2024 3:16PM by PIB Delhi. The union cabinet chaired by the Prime Minister Shri Narendra Modi has approved the mission to moon, named Chandrayaan-4 to develop and demonstrate the technologies to come back to Earth after successfully landing on the Moon and also collect moon samples and analyse them on …