Pressure switch (optional) is installed in system to realize automatic transfer for pump under low oil pressure.
系统中设有压力开关(可选)，以实现在低限油压时的泵组自动切换。
These patented exchangers have high heat transfer with low pressure drop because of short flow length.
这些申请专利的换热器由于流长短而具有传热高、压降低的特点。
Pressure switch is installed in system to realize automatic transfer for pump under low oil pressure.
系统中设有压力开关，以实现在低限油压时的泵组自动切换。
Wire mesh honeycomb combines a low pressure drop compared with powder catalyst and high mass transfer compared with ceramic honeycomb, mainly attributed to the high porosity of wire mesh structure.
蜂窝状筛网催化剂的高开孔结构，使其较粉末催化剂具有较低的压力降，较蜂窝状堇青石催化剂具有较高的传质系数。
This article mainly reviewed researches on heat-transfer modeling during ultrahigh pressure processing, freezing and thawing process under ultrahigh pressure and low temperature.
本文综述了食品在超高压处理过程中的传热模型和相转变的研究进展，对超高压低温条件下的冻结和解冻过程也进行了讨论。
Thermal behavior of vacuum concentric tube annulus is a process involving combined heat transfer mode, in which the thermal conduction of low pressure gas plays an important role.
真空同心管套涉及传导、辐射等传热方式，其中低压气体的热传导非常复杂，是分析问题的关键。
It has advantages such as reasonable flow channel structure; low pressure drop; high processing ability, high mass transfer efficiency, good design flexibility and wide applicability.
它的特点是流道结构合理，阻力降小，处理能力大，传质效率高，设计弹性大，适用范围广。
The plastic hose has been broadly used in farmland irrigation of low pressure water transfer pipeline.
塑料软管被广泛应用于农田低压输水灌溉，但至今其水力特性仍未被充分研究。
It is suggested that the oblique-cut semi-cylinder shell is a kind of VGs with efficient heat transfer enhancement but low pressure drop.
结果表明：斜截半柱面涡流发生器是一种强化换热效果好又阻力损失小的涡流发生器型式。
It is suggested that the oblique-cut semi-cylinder shell is a kind of VGs with efficient heat transfer enhancement but low pressure drop.
结果表明：斜截半柱面涡流发生器是一种强化换热效果好又阻力损失小的涡流发生器型式。
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