问题 问答题 简答题

如何防止缝明线时,在多层接缝处发生面料断丝?

答案

参考答案:

面料生产断丝的原因随着针,梭子,线的松紧不同,多层接缝处也因厚度不同,产生各自的要因。如果仅只是问题中,所谈到的多层接缝处防止断线的话,缝迹针码密集可谓是造成其现象的主要原因。送布牙向前送布时,出现其后端不接触压脚的后部。

这种现象在针码1.8mm以下时,特别容易出现。为此,压脚走到多层缝合处,压脚的后部与针板之间,发生挤面料,送布不良等现象,也是产生面料断丝的原因。

阅读理解

阅读理解。

     Switzerland (瑞士) is famous for its watches. However, this country didn't invent the watch. It was the

British who did. Here is a story of how the watch was brought to Switzerland.

     Many years ago, an Englishman traveled to Italy. This Englishman traveled in a Carriage. On his way, he

stopped in a small town called Geneva in Switzerland.

     There was a carriage clock in it. This was the earliest kind of watch. A blacksmith's assistant happened

to see the clock. He wanted to know what it was and asked the English man about it. "It is a carriage clock."

said the man. "This machine can tell the time but it isn't working now."

     The blacksmith's assistant wanted to try to repair, so the traveler handed him the clock. The assistant was

a very clever man, so it was easy for him to repair it. He even remembered how it was made. As soon as the

traveler had gone on his way, he made a watch of exactly the same type (样式).

     So the watch-making was started in Switzerland. Today, Swiss watches are sold in countries all over the

world.

1. What is Switzerland famous for?

A. TVs.

B. Pens.

C. Watches.

D. Shoes.

2. What can the carriage clock tell?

A. A story.

B. A joke.

C. The time.

D. A lie.

3. Which of the following is true?

A. The blacksmith's assistant didn't want to have a look.

B. The blacksmith's assistant wanted to wear the clock.

C. The blacksmith's assistant wanted to repair the clock for the man.

D. The blacksmith's assistant repaired the carriage.

4. From the passage, we know that _____.

A. Japan started the watch-making.

B. Swiss watches are sold only in Switzerland.

C. The English traveler was the inventor of the watches.

D. Swiss watches are sold all over the world.

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