The clip type retarder and arrestor is a kind of speed control device of no need for holing in the track.
卡式减速顶、停车顶是一种不需要在钢轨上钻孔的调速设备,由于它安装方便灵活,其市场前景非常广阔。
Evidenced in Nanging area, with the contingent valuation method which structured by payment card, this paper measures public’s willingness to pay(WTP) for water quality improvement of Yangtze River, the results show as following: (1) The mean WTP is 100.
本文以南京市为例,利用支付卡式的条件价值评估(CVM)技术,通过发放调查问卷及访谈的形式对公众改善长江水质的支付意愿进行了深入研究。
Objective To discuss the veracity of typing blood group with Biovue positive blood group system in clinic.
方法用试管法和卡式法(Biovue卡)两种方法鉴定522例我院住院患者和门诊健康体检者,按性别、年龄、标本状况、血型、健康状态分成5组进行统计,比较这5组中两种方法的检测结果,计算出卡式法鉴定血型的准确率。
