问题 问答题 论述题

叙述射孔安全自控系统的组成及原理?

答案

参考答案:

1)射孔安全自控系统的组成

射孔安全自控系统主要由射孔马笼头、快速连接器、大电流安全雷管、压力型防爆避爆装置(避爆体)等组成。

2)射孔安全自控系统的原理是:

1.使雷管引火线在常压下处于断路状态,桥丝处于短路状态,并封闭在金属壳内部。因此雷管可以完全排除外界干扰,其具有防静电、防感应、防杂散电流、防误操作等特点。

2.在地面状态下,自动隔离射孔爆炸序列元件之间的联系,使雷管与后续元件导爆索、射孔弹分割开。这样雷管成为一个相对独立的部分,即使雷管误作用,其爆炸能量也不能传给后续的导爆索、射孔弹,射孔弹不会被引爆,因而就不会发生恶性事故。

完形填空

阅读下面对话,掌握其大意,并根据所给字母的提示,在标有题号的右边横线上写出一个英语单词的完整、正确形式,使对话通顺。

J =" John      " R = Robert

J:  I hear that an important meeting is to be ( 76 ) h       in our    76.           

city. What’s it about?

R:  It’s said that its (77) g       is to make clean drinking         77.         

water available to all.

J:   Who do you know will (78) t        part in the meeting?      78.       

R:   Representatives from more than 80 countries, as is

(79) r       on TV.                                        79.      

J:   Could you tell me (80) m       ?                         80.        

R:   Sure! Three things will be (81) d         at the meeting       81.        

—ways of making good use of water, (82) r       water      82.         

pollution and saving water.

J:   That’s good news for people in this area. As you may know,

there are too (83) m       factories around here, which let     83.        

out plenty of poisonous gas and polluted water. So we eagerly

hope that strong (84) m        will be taken to stop the        84.       

water pollution.

R:   I quite agree with you. Let’s hope for the day to come as

soon as (85) p        .                                 85.        

填空题