A new adjustable way was developed first time which use cluster well to decrease drilling cost and increase benefit in deep imbedded, low permeability, high pressure reservoir.
首次提出在深层高压低渗油藏采用分支井技术降低钻井成本、提高开发效益的调整手段。
High, middle, low of the tone and echo effect adjustable.
音调的高音，中音，低音和混响效果可调。
They have characteristic of low melting point, low vapor pressure, adjustable acidity, strong solubility and high viscosity.
它具有熔点低、蒸气压小、酸性可调及良好的溶解度、粘度和密度等特点。
This simulator has several advantages, e. g. low frequency, high power, and its transmitting sound level is adjustable, which could meet the engineering demands of kinds of open sea tests.
模拟器具有低频、大功率等优点，并且发射声源级可调，可满足多种海上试验的工程需要。
This simulator has several advantages, e. g. low frequency, high power, and its transmitting sound level is adjustable, which could meet the engineering demands of kinds of open sea tests.
模拟器具有低频、大功率等优点，并且发射声源级可调，可满足多种海上试验的工程需要。
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