模具專業(yè)英語lesson

1、English for mold and dieLessons 41開場白今天的任務(wù)（Today task)THESTART符號如何念（symbol Pronunciation)復(fù)習(xí)與測試（review and test)模具簡介（mold introduction )講解作業(yè)（explain homework )Task 1Review and TestTask 2 Explain homeworkexample at here5您的聆聽FOR LISTENING1. Use eye protection in the machine shop is the most important s

2、afety rule of all. example at here6您的聆聽FOR LISTENING2. This sign warns persons that they are entering an area that requires ear defenders so ear protection must be worn in this area to protect workers form damage to their hearing. example at here7您的聆聽FOR LISTENING3. Its an electrical safety sign. It

3、 means high voltage may cause electrical shock. Keep far from this area. HIGH VOLTAGEexample at here8您的聆聽FOR LISTENINGCORROSIVE4. This symbol means dangerous liquid, dont touch. example at here9您的聆聽FOR LISTENING5. This is the symbol for a demand to wear safety shoe. Task 3symbol Pronunciationexample

4、 at here10您的聆聽FOR LISTENINGpoint onepoint zero onepoint zero zero onetwo point three fiveOne quarter / one forthone tenthone hundredthplus /positiveminus/negativemultiplied bydivided byequalsplus or minusMore than/greater thanexample at here11您的聆聽FOR LISTENINGexample at here12您的聆聽FOR LISTENINGX plus

5、/X positiveZ minus/Z negativeOne quarter of an inchone and a half inchesone hundredth of an inchone thousandth of an inchFive one-thousandths of an inchthe ratio of one to twoninety degreesthe sine of thirty degreesone thousand revolutions per minuteeighty meters per minuteV sub Cspindle speed equals one thousand times the cutting velocity divided by pie times diameterexampl