This paper select surface of welding wire which ties up with feedability as object, advance the criterion about feedability of welding-wire, then analysis surface of welding-wire parameter which is depicted by LD/LT and KY and estimate practically feedability to testing its applicability.

After reviewing the developing progression and present situation, under the national quality standards, a computer-based testing device for welding wire-feedingsystem was developed based on a deeply researching into the affecting factor to wirefeeding-system feeding stability.

It influences the mincing performance, expulsion performance and power consumption of machine directly.

By the analyse of change course about low temperature pumping performance testing method of engine oil, we put forward the necessity of analysing the low temperature pumping performance particularly to the used engine oil, and the effect factor of low temperature Pumping Performance and Re-tentivity of Engine Oil are described in this article.

However, its pumping mechanism has not been fully understood and a study of its pumping performance has still been in a primary experimental stage.

Under the condition of the same proportion,same slump,there is no significant difference on the pumping performance between the tailing dinax and the natural dinax;with the same proportion,the cohesive property and water-retaining property of the iron tailing dinax are worse than the natural dinax concrete.

The variation trend of tensile strength of doped tungsten wire is analysed under a established technological conditions, and the influence of tensile strength of finished wire upon its wire_wound performance is analysed also.

It was found that miPP whose spinnability was profoundly affected by temperatures had fairly good spinning performance at lower temperatures; miPP wound yarn was better in tensility as compared with ziPP wound yarn; and .