The cutting of Hero 642 in curved root canals was balanced and there was almost no transportation of canals central lines when the simulated canals were prepared to 0.02 taper 25~# and 30~# files.
For currently adopted wheel tread profile,rail gage and rail head profile for Chinese railway,the change of the distance between backs of the wheel flanges from 1 353 m to 1 360 m will result in the increase of wheel-rail equivalent conicity and consequently decrease the critical speed of vehicle motion stability.
Probe by the laser ablation be easy to obtain the big cone angle, and the surface is smooth. The tips diameters are in the range of 80-200 nm ,and the taper angle 40°-81°,transm ission efficiency of 3.5×10~(-3).
A commercial single-mode silica fiber with a low GeO2-doped core was etched in hydrofluoric acid(HF). At a proper ratio of the etching solution,followed by laser ablation,smooth faced tip with satisfied cone angle and diameter was obtained. The tips diameters are 80～200 nm,and the taper angle are 40°～81°,transmission efficiency is 3.5×10-3.
It is the first time to cut specially shaped tops and bottoms by the new technique of simultaneously controlling four axes of X, Y, U, V on WEDM-LS. This technique can be used to cut any kind of complicated workpiece with taper angle.
So, firstly, the system is analyzed by mechanics and hydrodynamics to investigate that the main factors, which influence the lubrication drop rate, especially focus on ambient temperature, lubrication type, taper angle and control valve position of the system.
With the three tapers 1/14, 1/16 and 1/17, for the round casing connector, the curves that the jump-out loads varied with the loading process were obtained.
A small deep precise hole is such a hole that its diameter is less than φ 12mm, its depth is fivefold deeper than the diameter, the precision is H7, H6 degree tolerance, the smooth surface is ▽_7～▽_(10) degree and the bore-out-of-round cylinder-outof-round or conic are all within 1/2～1/3 of the tolerance.
Results:The time of Preparation in group A is shorter than that in group B(P<0.001),The effect of Preparation and obturation was different in the zone near root apex according to the radiographs.
For different angles of taper of the conical section of the hydrocyclone, the pressure and velocity distributions are calculated, together with the dependence of the fluid film thickness on the axial coordinate.
Coupling 40-fs 0.6-nJ pulses of 1.25-μm Cr:forsterite laser radiation into a tapered fiber with a taper waist diameter of about 2 μm and a taper waist length of 90 mm, we observed the spectra spanning more than two octaves at the output of the fiber.
A new version of the relativistic backward wave oscillator (BWO) is proposed and investigated experimentally, where the cutoff (for the working mode mode) taper at the cathode end is replaced by a selective Bragg-type mode converter.
At efficient conicity, close contact of the ingot with the working wall is ensured and heat exchange is intensified over the entire height of the crystallizer.
Evaluation of the effect of taper angle and porous layer permeability on the dependences determining the stability boundaries of the bearing operation is presented.
As a result, the external part of the wedge had a lower strength and a smaller critical taper angle than its internal part, so the orogenic load is upward concave.
锥度
taper
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