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▲ The students write what the teacher reads in English: 1. output terminal 2. diode 3.channel 4. valve 5. corresponding6. When several loads share the same power supply, to simplify the wiring, we can connect the corresponding independent COM terminals to a short-circuit wire.▲ 1. The students read the words after the teacher, paying attention to the pronunciation of the words. (The phonetic symbols for “denote” in the textbook isnot correct, it should be [])2. Ask some students to read the words. The teacher corrects their pronunciations if necessary.3. Pair work: One student speaks English, the other speaks Chinese.4. The teacher explains the following words:1) contact接触、接触器e.g If the exposed wirescontact，we shall have a short circuit.如果那暴露的电线相互接触，就会出现短路。
注意，contact 不要与contract（合同）混淆。
2) register n & v记录, 登记, 注册, 寄存器The company must be registered before the end of October . 公司必须10月底以前注册。
dry run mode keyprogram start keymachine lock keychip CW key: Discharge chips clockwisechip CCW key: Discharge chips counterclockwiseATC CW key: Tool storage turns clockwiseATC CCW key: Tool storage turns counterclockwisecutting fluid control key: Open or close the cuttingfluidshome start key: Press the key and select X，Y or Zaxis, the machine returns to the reference pointspindle CW key: Spindle rotates clockwisespindle stop key: Spindle stopspindle CCW key: Spindle rotates counterclockwisecycle start key: Make the program run automaticallyfeed hold keyemergency stop keypower on key: Power on the CNC machinepower off key: Power off the CNC machine2. An Example of Machining（1）Power on 开机 Now that you are familiar with the control panel and operation panel, you may power on the machine. 【熟悉了控制面板和操作面板后，就可以接通电源了】 （2）Return to the reference point 回参考点 Reference point which is fixed by the manufacturer is the farthest distance along the positive machine axes. The machine must be found its fixed machine reference point before it can be performed any operation. 【参考点由机床制造厂设定并且固定不变，它是机床坐标轴正向的极限点。
