摘要:The gross domestic product (GDP) or gross domestic income (GDI), a basic measure of a country's econ[阅读全文:]
摘要: 豆浆 Soybean milk 烧饼 Clay oven rolls 榨菜肉丝面 Pork, pickled mustard green noodles[阅读全文:]
摘要:1. George Washington 乔治·华盛顿 1789-17972 John Adams 约翰·亚当斯 1797-18013 Thomas Je[阅读全文:]
摘要:This article is about the German Institute for Standardization. For other uses of "DIN", see DIN (d[阅读全文:]
摘要:British Standards are produced by BSI Group which is incorporated under a Royal Charter and is formal[阅读全文:]
摘要:ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specifica[阅读全文:]
摘要:ASTM A490 and ASTM A490M are ASTM International standards for heavy hex structural bolts made from al[阅读全文:]
摘要:ASTM A500 is a standard specification published by the ASTM for cold-formed welded and seamless carbo[阅读全文:]
摘要:A514 is a particular type of high strength steel, which is quenched and tempered alloy steel, with ba[阅读全文:]