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自从有人类以来,就有了工程机械的雏形。挖掘机(准确地说应该是单斗正铲挖掘机)就运用了先人用铁锹挖土的简单工作原理:自行式铲运机是由独轮车运土的基本原理发展而成的。在《天工开物》一书中记载了我们祖先使用的许多原始工具实例,这些大多成为当今工程机械的起源。遗憾的是,所有
Since human beings, there has been a prototype of construction machinery. Excavators (to be precise, single-bucket shovel excavators) use the simple working principle of pioneering shovels: self-propelled scrapers are developed from the basic principle of unloading wheelbarrows. Many examples of primitive tools used by our ancestors are recorded in The Book of Heavenly Creations, most of which are the origins of today’s construction machinery. Unfortunately, all