Keywords Volcanic gas;Hot spring and fumarole gas;Igneous gas;Ore deposit gas;Salt gas;Associated gas;Coal bed gas;Mud volcanic gas;Ground water gas;Fault and earthquake gas;Ductile shear zone gas;Upper mantle gas.;
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With hemp ropes and bamboo cables reaching deep into the ground, they employed cast iron drills to reach the natural gas they used as a fuel to evaporate water from brine to produce salt.
麻绳和竹管被深入到地下深处，以铸铁深钻直到得到天然气，并以此为燃料将卤水中的水蒸发来生产食盐。
There must be prompt: the use of gas pipes and water pipe ground is absolutely impossible!
这里一定要提示：使用燃气管道和自来水管道接地是绝对不可以的！
This receiver requires an antenna and ground. The ground connection can be made to a water pipe (NOT a gas pipe!). The antenna can be a 50 foot length of wire stretched outdoors between two objects.
此接收机需要天线和地线，地线可以为金属水管(不能是煤气管)，天线可以是50英尺的线挂在两个物体上。
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