[填空题]

ABC Co. Ltd.
Gentlemen:
We are sure that you would be interested in the new "Chang-Ling" Vacuum Cleaner(真空吸尘器) which is to be placed on the market soon. Most of the good points of the earlier types have been incorporated(使合并) into this machine which possesses, besides, several novel(新颖的) features which have been perfected by years of scientific research.
You will find that a special mechanical device enables it to run on slightly more than half the current required by machines of equal capability. Further, most of the working parts are readily interchangeable and, in the event of their being damaged, they are thus easy to replace.
The special advantages it offers will make it a quick-selling line, and we are ready also to cooperate with you, by launching a national advertising campaign. Moreover, we are ready to assist to the extent of half the cost of any local advertising.
Bearing mind the rapid turnover(周转) which is likely to r

ABC Co. Ltd.
Gentlemen:
We are sure that you would be interested in the new "Chang-Ling" Vacuum Cleaner(真空吸尘器) which is to be placed on the market soon. Most of the good points of the earlier types have been incorporated(使合并) into this machine which possesses, besides, several novel(新颖的) features which have been perfected by years of scientific research.
You will find that a special mechanical device enables it to run on slightly more than half the current required by machines of equal capability. Further, most of the working parts are readily interchangeable and, in the event of their being damaged, they are thus easy to replace.
The special advantages it offers will make it a quick-selling line, and we are ready also to cooperate with you, by launching a national advertising campaign. Moreover, we are ready to assist to the extent of half the cost of any local advertising.
Bearing mind the rapid turnover(周转) which is likely to r

Gentlemen:
We are sure that you would be interested in the new "Dong-Guang" Vacuum Cleaner (真空吸尘器) which is to be placed on the market soon. Most of the good points of the earlier types have been incorporated (纳入) into this machine which possesses, besides, several novel (新颖的) features which have been perfected by years of scientific research.
You will find that a special mechanical device enables it to run on slightly more than half the current required by machines of equal capability. Further, most of the working parts are readily interchangeable and, in the event of their being damaged, they are thus easy to be replaced.
The special advantages it offers will make it a quick-selling line, and we are ready also to co-operate with you, by launching a national advertising campaign. Moreover, we are ready to assist to the extent of half the cost of any local advertising.
Bearing in mind the rapid turnover which is likely to result,