1.Intend to place a duplicate order with us for 50 metric tons of Brown Crustal Sugar"
2.We have examined the sample cuttings sent us by airmail. "the sample cuttings "什么意思
3. A similar but well-established cloth from India is abailable at 17.5d. per yard.
17.5d. 是17.5dollars 吗 well-established cloth 是什么意思

1.Intend to place a duplicate order with us for 50 metric tons of Brown Crustal Sugar"
有意（有如上次一样）再给我们一份要50吨黄晶糖的订单。

2.We have examined the sample cuttings sent us by airmail.
句内的“the sample cuttings”，是“剪下来的样板”的意思。可能是从一匹布上不同地方剪下的，或是从一批有很多匹布中不同地方剪下的样板。

3. A similar but well-established cloth from India is abailable at 17.5d. per yard.
“17.5d.”应该是“17.5dollars”吧。
“well-established cloth”是知名厂商所生产的布。