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Essential for tanner. It is of great importance and interest to the tanner to know what might be considered the minimum that the tanner should know to earn on his business successful in modern times. It is of value for tanner to become familiar with the structure, microstructure. composition and function of the living skin and with the structure and physical properties of characteristics of leather' and their dependence upon chemical composition and the various mechanical operations to which hides and skins are subjected in the course of their manufacture into leather. A tanner should know something of the worldwide sources and availability of hides, skins and various other materials necessary for leather manufacture. It is of great importance to be familiar with the types of damage to which hides and skins are liable, both on the living animal and after slaughter. It is essential for a tanner to understand the operations used in converting raw hides and skins into finished leather and effect of each operation upon the properties of the finished leather. To be really he must learn how to choose the raw stock best suited to make any given kind of leather and how to regulate its characteristics by appropriate adjustments of the chemical and mechanical work done.

Answer the following questions.

1. What must a modern tanner know?

2. To what operations are hides and skins subjected in their manufacture leather?

3. Why is it important to know about the types of damage to which hides and skins are liable?

4. Why to be successful a tanner must know how to choose the raw stock?

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Ответ:

misharudakov2

09.06.2020 07:09

My city – Moscow. I love its streets, parks and squares. I love listen to the beat of her heart by day and brooding, tired breathing at night. It is very different, my Moscow. If she is angry, the sky is grey, there is chilly rain, and the soul longing and sadness. If Moscow fun, circle, light, sun, smiling people and flowers. Well, if this happens with Russian prowess, games Yes dances, and then he will go on a whirlwind truly Russian amusements, will not stand to walk in the dance for the New year, ride a roller coaster on a sled or snow saucer down an ice, to celebrate Shrove Tuesday pancakes with caviar. And the effigy of winter is sure to burn. "Moscow is a big welcoming home ", according to our wonderful photos of Marina Tsvetaeva. Since ancient times, as usual in Russia, Moscow met with bread and salt. Everyone has place if people came to us with good intentions. And, of course, today's Moscow is a city of contrasts. It combines quiet streets of ancient streets, paths and parks estates and broad avenues, with their rushing at a furious pace cars. It is possible to plunge into the historical past, after wandering around red square, after listening to the bells of its churches or after standing at "Trinity" by Andrei Rublev, one can feel the taste this, considering the enormity, and sometimes the absurdity of Moscow skyscrapers, you can think about the future of this great city.

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Ответ:

барев34

14.04.2021 21:12

1. Did you read this book yesterday? - Yes, I did. I read this book yesterday. / No, I did not.
2. Did you make this project last year? - Yes, I did. I made it last year. / No, I did not.
3. Did you go there last summer? - Yes, I did. I went there last summer. / I didn't.
4. Did you have a dinner in the evening? - Yes, I did. I had a dinner in the evening. / No, I didn't.
5. Did you take this exam in the past? - Yes, I did. I took it in the past. / No, I didn't.
6. Did you buy a car 5 years ago? - Yes, I did. I bought it 5 years ago. / No, I did not.
7. Did you get it? - Yes, I did. I got it. / No, I did not.

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