The researchers found 63 U.S.-based companies in existence that coordinate international health care trips and got 45 of them to complete a survey in 2008.
研究员发现63家美国公司在做国际医疗旅行活动，2008年对其中的45家进行了调查。
2
The researchers found 63 U. S. -based companies in existence that coordinate international health care trips and got 45 of them to complete a survey in 2008.
研究员发现63家美国公司在做国际医疗旅行活动，2008年对其中的45家进行了调查。
3
Contract the coordinate between different known survey points in mining area and the survey points by GPS receiver after establish the projection mode and scale parameter.