我们日常使用的许多物品,包括工具、器械、管路等,都要用到螺钉、螺栓。我们所从事的机械制造、航空航天、工程建筑、家用电器等方面,同样要用到螺钉、螺栓。或许是因为它们过于渺小而不为人所注意, 或许是因为它们过于普通而不为人所提及, 这当然也就更少有人对这些螺钉、螺栓作过多的思考了。为此,因小小的紧固件使用 Many of the items we use daily, including tools, instruments, piping, etc., require the use of screws and bolts. We are engaged in machinery manufacturing, aerospace, engineering and construction, household appliances, etc., also need to use screws, bolts. Perhaps because they are too small to be unnoticed, perhaps because they are too ordinary to be mentioned, and of course fewer people think too much about these screws and bolts. For this reason, the use of small fasteners