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The surface morphology of the PI thin films characterized by densely-packed round grains is shown in Fig. 4.
VDP films can be routinely laser drilled, they show excellent chemical resistance, and are fully compatible with a number of standard fabrication processes, such as metal sputtering and electroplating References [1] J.

The delivery pump system serves as the main component of the cement foaming machine, because foam cement grout is sticky and contains grain, peristaltic pumps are needed to pump and pour.
Cross section area of inner circle before and after change So, the flow rate of peristaltic pump in which, n-the number of compress roll.

The median particle size was determined by counting the number of particles of a given grain size in a given area.

The HDDR process is influenced by a large number of variables that are interrelated and major efforts are being devoted to the study the complex processing of these materials [2,3,4].
The HDDR process allows the refinement of the matrix phase’s grain providing a material for the preparation of permanent magnets with magnetic properties [1].

During the deoxidization process, there were two forms of iron mineral grains: one was covered by siderite and the other was single.
Conclusions (1)For the refractory ore containing siderite from Donganshan, “two-step floatation” was adopted and siderite was obtained in the first step, then reduction roasting-magnetic separation experiments were carried out, such an index was obtained the grade and recovery of concentrate were 60.43% and 83.59%, and for tailings, the two numbers were 14.86% and 16.41% respectively; (2)It was showed by the results of experiments that the optimum conditions were: roasting temperature 700℃, roasting temperature 15min, ratio of coal 6% magnetic field intensity 1.18×105A/m, feed fineness for the secondary low intensity magnetic separation -0.0375mm accounting for 85%; (3)Results of experiments indicated that regrind was necessary for the concentrate of the first-stage magnetic separation, so as to improve the grade of magnetic separation concentrate; References [1] Zhang Zhaoyuan, Lv Zhenfu, Yin Wanzhong and Han Yuexin.

Phase analysis of iron ore and grain size analysis test results are shown in the table 1 and table 2.
Through the experimental phenomena and results we can see that, the uniform size and number of bubbles can improve the grade of the concentrate, but inflation is too large, the grade of concentrate decreased.

Fig.1 Corn harvester 3D simulation effect diagram Fig.2 Corn harvester CAD diagram 1.2 The main technical parameters The shape size6500×1300×1900mm; Matching power of 20 horsepower diesel engine; The number of lines 2 lines of work; To adapt to the row spacing 300～800mm; Stubble height≤50mm; Ear loss rate≤0.1%; The grain loss rate≤0.5%; Harvesting rate 5-6Mu/h。

Table 1 304 austenitic stainless steel treatment parameters Sample Numbers Voltage (V) Current (A) Holding temperature (˚C) Holding time (h) Pressure (Pa) Flow ratio (C3H8:H2) 1 800 1~3 450 10 360 1:40 2 Untreated Testing procedures.
For the metallographic analysis, the ferric chloride hydrochloric reagent (5g FeCl3, 50ml HCl, and 100ml H2O) were used to reveal the austenite grains.

Damage to the dovetail comes by pressing the wedge part and splitting it perpendicularly to grain.
· When the beam displacement (sag) applies it is applicable to increase the number of keys.

Identification and characterization of microdefect systems in one of the glass grades: a) determination of the coordinates of microcracks in the V (Z) -curve regime; b) the dependence of the number N of detected microcracks in the V (Z) -curve regime on the thickness of the stripped layer; c) the dependence of the strength of glass (K-108) on the depth of cracks.
These characteristics allowed us to determine the grain size of steel structures, to obtain acoustic images of these structures without any additional processing.