Cinder cone volcanoes are formed when magmas with high gas contents and high viscosity are blown high into the air during an eruption. 火山渣錐火山是，當爆發時，高氣體含量和高粘度的熔岩被噴發到空氣中而形成的。
In the tracking-mode, the instrument generates an increasing or decreasing rate of beeps, depending on the gas concentration detected. 在檢測模式下，儀器根據氣體含量來增加和減少頻率不同的嘟嘟聲。
Concrete air content test equipment. 混凝土含氣量測定儀。
An increase in background gas, as the mud weight overbalance gradually decreases. 由於鑽井液密度逐漸下降失去平衡，鑽井液的含氣量上升。
