模具专业英语lesson

1、English for mold and dieLessons 41开场白今天的任务（Today task)THESTART符号如何念（symbol Pronunciation)复习与测试（review and test)模具简介（mold introduction )讲解作业（explain homework )Task 1Review and TestTask 2 Explain homeworkexample at here5您的聆听FOR LISTENING1. Use eye protection in the machine shop is the most important s

2、afety rule of all. example at here6您的聆听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您的聆听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您的聆听FOR LISTENINGCORROSIVE4. This symbol means dangerous liquid, dont touch. example at here9您的聆听FOR LISTENING5. This is the symbol for a demand to wear safety shoe. Task 3symbol Pronunciationexample

4、 at here10您的聆听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您的聆听FOR LISTENINGexample at here12您的聆听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