题目内容
模具成型是各类零件加工方法中生产成本最低、原材料消耗最少、效益最高成型方法之一。
查看答案
搜索结果不匹配？点我反馈
更多问题
压注成型即压铸成型。
模具是批量生产同类产品的工具。
压注成型是注射成型一样，原料都在设备中熔化，在压力的作用下注入闭合的模具型腔，因此产品精度较高。
Fill in the blanks. The words in bracketswill give you some hints.St. Valentine's Day - A Lover's DayOn 1) (when?)_____________, St. Valentine's Day, young people in2) (which country?)_____________send cards to the person or persons theylove. This 3) _____________(what?)started more than 4) (how many?)_____________years ago.Today the cards are 5) (how?)_____________and are sent more in funthough with the same purpose of telling someone you love 6) (whom?)_____________.You, however, do not put your name on the 7) (when?)_____________so the person receiving it does not know who it is from. You cover up yourhandwriting 8) (where?)_____________or get someone else to post it for you.If you receive a St. Valentine card, you may have to spend 9) (how long?)_____________trying to find out who sent it. Although you usually have 10) (what?)_____________who it is, sometimes you never find out.
微信支付 
支付宝支付