商務(wù)英語寫作范文:因生產(chǎn)設(shè)備的改進(jìn)，提前交貨

Dear Sirs:

　　In our previous letter we could not guarantee the delivery within six months.? We are glad to inform you that we have improved our production facilities and are now in a position to offer shipment within three months after receiving an order.?　　

　　Yours，