double rate meaning in Chinese

按每间房双人居住的价格计算的房价
双率计

Output from 0 to double rating volts at rating amperes
在额定电流下，输出由0到两倍额定电压
Output from 0 to double rating amperes at rating volts
在额定电压下，输出由0到两倍额定电流
For overdue loan and loan used for personal purpose , penalty rate or double rate should be imposed subject to the severity
同时出现逾期和挪用情形的贷款，应择其重计收罚息和复利。
2 a certificate which has lapsed for failure to pay the annuity may be renewed within six months from the last day of the month when the certificate was granted , provided the overdue fee is paid at a double rate at the patent office
2因未缴年费而失效的证书，只要在证书授与那月最后一日起算的六个月内按双倍费率向专利局缴纳逾期未付的费用，即可展延。