A pipe comprises two permanently bonded layers of non-cross-linked thermoplastic polyolefins, the inner layer having roughly FNCT (full notched creep test) value of a single layer standard pressure pipe and the outer layer having a 3 times higher F value. Preferred Features: Both layers consist...
The utility model relates to a mother-child type double-layer semen freezing tube which is provided with a child tube. A mother tube is arranged outside the child tube; the child tube is positioned inside the mother tube; and the mother tube is provided with a tube body and a spiral cov...
The above alloy is used as a liner material and a steel tube for standardized boiler is used as a base layer material, by which a double layer steel tube can be obtained. This alloy has high corrosion resistance under the desired service environment and also has high usability as double ...
Before mounting the CSMO crystal into the FIB/SEM column, a thin layer of carbon was deposited for better electron conductivity and preventing charging. The regular TEM samples were prepared by first lifting out the 1–2 μm lamella from the crystal surface and mounting the lamella onto the...
Moreover, the model is applied to a multiple layer ground regime. In Section 4 the numerical model is used for the study of a double U-tube GHE and a comparison is made with the single U-tube GHE. Finally Section 5 accommodates a discussion including the important findings of the ...
The double-layer spraying plastic connecting steel tube has the advantages of having the anticorrosion capacity and being capable of adapting to the moist environment or the corrosive environment, long in service life and free of leakage accidents.侯成安...
Double layer flowerpot for plants has air passage that is axially extended through hollow head and threaded shank of lock screw bolt fastened to bottom tube of outer pot body 来自 掌桥科研 喜欢 0 阅读量: 10 申请(专利)号: NL20021019691 申请日期: 2002-01-03 公开/公告号: NL1019691C2 ...
PURPOSE: To simply clean the inside of tube and repair tube after constructing tubes as well as simplify the construction of tubes by a connector for double- layer tube consisting of an inner tube having a drin passage and an outer tube covering the inner tube, having an air passage between...
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29. A steam generator as defined in claim 28, wherein a layer of insulating material surrounds the guard vessel, supported at the ends of said vertical fins. 30. A steam generator as defined in claim 28, wherein said disengaging chamber is subdivided into discrete sections, each section co...