Because acid rain can transport excessive hydrogen ion into the soil, then cause decrease of pH value and cation saturation, accelerate acidify of soil, therefore, it is significant to study the ecological effects of combined pollution for heavy metals under intimidation of acid rain in the regions where acid rain often take place.

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Furthermore, this paper explored a new feasible process of cyanide recovery,investigated the effect of time, concentration of H2SO4 and temperature on the elution of cyanide and zinc in the process of first stage elution, and discussed the effect of time,concentration of ammonia water, temperature and ultrasonic on the elution of copper in the second stage elution.

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In order to solve the problems from obtaining reservoir's formation pressure and injectivity index of each zone by conventional methods,combined with percolation theory and the characteristics for continuous measuring the data of flow,pressure in setting the water injection profile logging unit in one run,a new method is proposed for de.

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Orthogonal experiment under special condition showed that modifier M has marked effect on properties of no bake sand. Other factors such as modifier B,phosphate concentration and aluminum hydroxide have some impact on properties of binder. It can be found by experiments that strengths of no bake sand are raised notably by binder that modified by modifier B. Modifier B can reduce the strength of no bake sand at high room temperature apart from condition of low room temperature that it can accelerate the reaction and strengthen the sand. Modest content of modifier M in binder has some improvement to anti-wettability of sand. But modifier B has not such notable effect. Electronic microscope shows that near cracks in no bake product there are fibrous shape substances formed when the samples are moistured in high humidity air for sometime.

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My home 3-4 hours to feed a baby, because he is also a suction breast suction will not smoke, so I according to the dose of powdered milk cans on the request of the breast pushed inside the bottle, such as four weeks the children eat 90make love, so I squeeze in 90make love bottle, the give him to eat, so he will not trouble enough, and basically will soon go to bed, this method may not be suitable for your baby, but you can try, sooner or later have to say your baby to eat from the breast and nipple, and you let him accept the pacifier as soon as possible, it may not be not a good thing.

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Using electric operation controlled lifting system so that the floating plate safe, stable, powerful stress job to ensure that the molding, simpler and quicker. 2 strong suction system without phase vacuum suction, negative pressure may have been the ideal state, the use of more convenient. 3 equipment, power can achieve the best working state of the lowest electricity consumption standards. 4 soften me with automatic temperature control system can be made under different heating plate settings required. 5 operating system, the use of numerical control system to operate, effective improve the efficiency of the operator. 6 advanced technology can be a cooling suction pressure molding, may also be under the light box, the different effects of the word alone or in a separate suction pressure, so that light boxes, forming a word.

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Through first aspiration,there was over 85% drainage of hematomas in 432 cases,50%-84% in 306 cases,less than 50% in 108 cases,and none in four cases.

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He did not fail to observe the curious equipages,- carriages and palanquins, barrows supplied with sails, and litters made of bamboo; nor the women,- whom he thought not especially handsome,- who took little steps with their little feet, whereon they wore canvas shoes, straw sandals, and clogs of worked wood, and who displayed tight-looking eyes, flat chests, teeth fashionably blackened, and gowns crossed with silken scarfs, tied in an enormous knot behind,- an ornament which the modern Parisian ladies seem to have borrowed from the dames of Japan.

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Through an analysis on mud-clogging mechanism of suction nozzles on wet type sweeper, a concept is suggested, that water ratio in dust nearing the wall of suction nozzle duct should be decreased so the mud stickiness can be controlled under a critical value and not sticking to the duct wall whereas water ratio in central dust passage of the duct is properly increased to satisfy effective dust absorbing. On the basis of the concept, a water spraying device is designed with improvement for suction nozzles. In the device, the water hole numbers, diameters and distribution along the nozzle circumference as well as initial direction of water spraying are all determined according to concrete suction nozzle structures.

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