一种充气产品的手动强制气密式气嘴，包括其中部设有进气通孔的气 嘴座；
The utility model relates to a hand-operated forced air-tight type air tap of gas-filled products, comprising an air tap seat with an air-in via hole arranged at the middle.
前言：通过应用振动式密度计试验研究，在国内建立起一种天然气密度在线测量的新方法。
A new method, on-line measurement of the density of natural gas, has been established by researching on vibrating element density transducer tests.
详细介绍过热蒸气密度补偿方案及新的过热蒸气密度补偿式。
The compensation scheme for the density of superheat steam and the new density compensation formula are introduced in detail.
通过应用振动式密度计试验研究，在国内建立起一种天然气密度在线测量的新方法。
A new method, on-line measurement of the density of natural gas, has been established by researching on vibrating element density transducer tests.
头带式面罩具有舒适性好、视野宽阔，但工艺较复杂、佩戴不易气密等特点。
Fillet gas mask has the features of comfortable wearing, wider visual field, but complex technology, sealed ability wearing is not easy.
文中简要分析了干气密封的工作原理及TM 02 D型串联式干气密封的结构特点。
The working principle of dry gas sealing and the structure feature of TM02D type series connection type dry gas sealing were analyzed briefly in this article.
介绍螺旋槽式干气密封的工作原理，通过在离心式压缩机上应用使瓦斯达到零泄漏，保证机组的安全操作与运行。
Principle of dry gas seal with screw groove type was introduced. It was applied in the centrifugal compressor to realize zero gas leakage. It has safety operation of the compressor group guaranteed.
介绍了串联式干气密封系统的结构、原理、特点及在BCL- 45 7型离心压缩机上的应用情况。
The Structure, working principle and characteristic of series dry seal system and the application of it on BCL-457 centrifugal compressor are introduced.
炉膛、U型钢分离器，以及过热器的外壳由顶部支撑、气密、全焊接的膜式管墙构成，因此不需要膨胀节。
The furnace, U-beam separator, and superheater enclosures are constructed entirely of top-supported, gas-tight, all-welded membraned tube walls which do not require hot expansion joints.
炉膛、U型钢分离器，以及过热器的外壳由顶部支撑、气密、全焊接的膜式管墙构成，因此不需要膨胀节。
The furnace, U-beam separator, and superheater enclosures are constructed entirely of top-supported, gas-tight, all-welded membraned tube walls which do not require hot expansion joints.
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