What is B5?
2 Answers
B5 is a paper size specification. The commonly used B5 size is EXTRA, which follows the international standard dimensions of 176mm x 250mm. Additionally, there was another standard of 182mm x 257mm used in mainland China before 1982. Like other paper sizes, the establishment of an internationally standardized B5 size aims to regulate and unify paper dimensions, which holds significant importance for promoting foreign trade and international exchanges. Below is some extended information: A3: A3 paper refers to the internationally standardized A3 size, measuring 297mm × 420mm. A4: A4 paper is defined by the ISO 216 standard of the International Organization for Standardization, with dimensions of 210mm × 297mm. This international standard is adopted by the majority of countries worldwide for their paper sizes.
I've been in the fuel industry for over a decade and have heard the term B5 mentioned many times. It actually refers to a grade of biodiesel, specifically a fuel blend containing 5% biodiesel with the remaining 95% being conventional diesel. Biodiesel is derived from used cooking oil or vegetable oils, making it quite environmentally friendly as it helps reduce carbon dioxide emissions. However, there's a major issue: not all vehicles are compatible with this fuel. For example, some older cars or high-compression ratio engines may experience clogged fuel injectors or reduced acceleration performance when using B5. Vehicle owners should always check their manuals for compatibility first. The promotion of B5 is an industry trend, but small production scale coupled with high storage and distribution costs have hindered its widespread adoption. In the long run, if technology and supply chains improve, B5 could significantly contribute to pollution reduction.
