1·And it was not possible to use data from the biogas volumeter to estimate gas production.
运行了很短的时间，所以不可能利用沼气流量计来估算沼气产量。
2·It is equipped with asphalt return tube, anti-puffing pressure vent valve, anti-aging overhead nitrogen valve, thermometer, volumeter and output asphalt rapid discharge valve and coupling.
配备沥青溢流管、防冒液呼吸阀、防老化顶置充氮阀、温度计、容量计和输出沥青的快速卸料阀及接耦。