论文部分内容阅读
1998年第三季度起硫酸粗松节油价格开始下跌,到1999年第三季度又下跌了20美元,目前的价格每加仑1美元到75美分。按照美国松化学品协会(Pine Chemicals Association)报导,到1999年4
The price of crude turpentine sulfate began to fall in the third quarter of 1998 and fell by another 20 dollars in the third quarter of 1999. The current price is between 1 and 75 cents per gallon. According to the Pine Chemicals Association report, up to 1999