period type meaning in English

期间类型

At the same time , the hong kong observatory also began to keep a record of locally felt tremors reported by the people of hong kong . the seismometer used was of the long - period type , sensitive to seismic waves with periods around 15 seconds and was suitable for detecting distant earthquakes
天文台总部使用的地震仪属于长周期地震仪，对震动周期约15秒的震动最敏感，适合监测远处发生的地震，结合其他国家的地震站数据可以测定强烈地震的震央位置。
At last , it ' s the analysis the internal character of real estate fluctuation in china , there are such problems as lack consume demand , the simple expansion or constringency of the quantity type ; product inclination motion ; obvious of policy period type motion ; the market mechanism is not perfect ; district development pole unb
最后就我国房地产周期波动的内在特点分析，它存在消费需求缺乏、数量型的简单扩张或收缩、产品倾斜性波动、明显的政策周期型波动、市场机制不健全、区域发展极不平衡、独立于世界经济之外的封闭型波动等问题。