Usually exact change is required in order to get a coffee from a coin operated coffee machine.
通常钱数要正好，才能从只接受硬币付款的咖啡机里买到咖啡。
Experimental Research on Tooth Trace Error Resulting from Index Change Gears of Hobbing Machine
滚齿机分度挂轮引起齿向误差的实验研究
The design of selective procedure of change gears used for additional movement of hobbing machine
关于滚齿机附加运动挂轮选择程序的设计
Experimental research on tooth trace error resulting from differential change gears of hobbing machine
滚齿机差动挂轮引起齿向误差的实验研究
Adopting DC electric reactor with center tap can change the welding machine's dynamic characteristic conveniently.
采用带中心抽头的直流电抗器，可以方便的改变焊机动特性。
When you get home, change out of your work clothes, let the answering machine take your calls, and stay away from e-mail.
回到家，换掉工作装，让留言机接听电话，别去看电子邮件。
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