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当前学科:钻井司钻工考试
题目:
单选
钻床的主参数是()
A . 加工精度
B . 钻轴的直径
C . 加工孔的直径
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We are pleased to receive your letter of May 10 and enclose our catalog and price list. Also by separate post we are sending you the samples of our products.Our catalogue contains items and their specifications of our supplies.Through comparing our prices with those of other suppliers,you will appreciate the moderate prices of ours.For a total purchase of not less than 50,000 and not more than 150,000 us dollars,we would allow a discount of 5%and for a purchase larger than 150,000 us dollars,we would allow a 10%special discount.
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