In most cases, low water pressure is the main reason for irrigation problems.

在大多数情况下，低水压是灌溉问题的主要原因。

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Swelling, cracking, dispersion, migration and plugging of clay minerals are the main factors of the reservoir damage in high-pressure low-permeability reservoirs.

粘土矿物的膨胀、破裂、分散、运移和堵塞是对高压低渗油藏储层伤害的主要因素之一。

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The pressure gradient and entrainment of vortexes are main reasons that synthetic jet actuator controls low speed primary jet direction.

压强梯度的存在和旋涡的卷吸作用是合成射流激励器控制宏观低速流流动方向的主要因素。

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"HSE's investigation has concluded that National Grid Gas have correctly applied their gas mains maintenance procedures in relation to the low pressure main located at 1-5 Bridge Street, " the report said.

BBC: Shrewsbury gas explosion 'no-one's fault' HSE concludes

It is a low pressure gas main.

BBC: Trains cancelled after Portsmouth gas leak