The maximum flow rate was (1.82±0.03) L/min, (2.44±0.03) L/min,(3.02±0.04) L/min, (3.31±0.03) L/min respectively for polyvinyl cannulae with wall thickness of 0.5 mm (PV 0.5 cannula) and inner diameter of 3 mm, 4 mm, 5 mm, 6 mm;
(1.82±0.02) L/min, 1.84±0.02 L/min for strengthened polyvinyl cannula with wall thickness of 0.8 mm (SPV 0.8) and inner diameter of 3 mm and polyvinyl cannula with wall thickness of 1.0 mm (PV 1.0 cannula) of inner diameter of 3 mm.
Under the same steel tubular wall thickness and steel strength,the cost of the ultra-high strength concrete filled-steel tubular columns with the 116MPa strength lessens than that of the steel tubular concrete with 30 MPa,54MPa and 83MPa by 30.3%,18.7% and 11.5% respectively,and the cross section area of them decreases by 54.9%,38.8% and 21.5% respectively.
(1.83±0.03) L/min, (3.07±0.04) L/min respectively for the polyvinyl chloride cannula with wall thickness of 1.0 mm imbedded by spring wire (PVCSW1.0) and inner diameter of 3 mm and 5 mm;
It was showed that the service life of different wall thick (20~175mm) and different weight (60~3300kg) and different size (6855mm×950mm) made by vermicular graphite cast iron were much longer than that of the alloyed grey cast iron.
By comparison with the gas-assisted injection molding, there are such advantages as higher cool efficiency, shorter molding cycle, smaller product wall thick and molding the product with larger diameter.
The key for solving the problem is to increase the drill pipe thickness, reduce working pressure and slideway friction coefficient, and rationally design the bending steering mechanism.
Fracture control principle means to decide upon the requirements of pipe toughness design for fracture conyol according to the curve of Cv vs. critical pipe thickness;
On the basis of study the law on the foundation following the mentioned above principle, we take buried time of pipeline, breakage per kilometer , anticorrosive layer kind, soil corrosiveness, operating of years and pipe thickness and anticorrosive layer of insulating resistance and pipeline-ground voltage as the factor that used to evaluate the status of gas pipeline.
After the length of water-cooling pipe, thickness of crucible-wall, inductance, feedback capacity, resistance of bias grid, and the size of raw materials were changed, an ideal operation condition and faster melting speed were obtained.
On the basis of the method of fuzzy synthetical evaluation,the evaluation model and evaluation method have been established for the optimal pipe thickness of long-distance pipeline. In this paper,a case analysis on the fuzzy synthetical evaluation has been carried out.
High-resolution transmission electron microscopy observation indicates that the nanocapsules are hollow-structured with a wall thickness of about 6 nm.
Because these geometric parameters are difficult to provide by fabrication, the wall thickness was increased by deposition of a silicon dioxide film on the outer surface of glass microspheres.
The distribution of the electric field intensity, temperature, velocity, and pressure drop is obtained depending on changes in the current strength, gas flow rate, and the wall thickness of the electrode nozzle.
Before ischemia, posterior end-systolic wall-thickness was increased by 0.19±0.35 (SD) mm during PESP with an abbreviated, by 0.36±0.42 mm with a regular, and by 0.60±0.42 mm with a compensated postextrasystolic interval.
Mode coupling theory and a finite element model (FEM) are applied to estimate the thickness (fT), lateral (fL), radial (fR), and wall-thickness (fW) resonances of the composite rings.
The nonlinear integral equations for a U-shaped bellows with compressed angle and varying wall-thickness are derived according to the simplified Reissner theory of large deflection for revolution shells and integral-equation method.