Fundamental rock-drilling studies are aimed at optimizing the drilling efficiency by identifying the optimal drilling conditions and rock drillability. In this study, a field-drilling test is performed using a rotary non-percu. [pdf]
Dongguan is dubbed as a "National Basketball City" and is the only prefecture-level city with three professional basketball clubs in China. Established in 1993, the are the first professional basketball club in China, and won eleven (CBA) championships. The city hosted events during the at the [pdf]
Bearing function and selection criteria Bearing arrangement examples Bearing lubrication Bearing rating life Operational limitations Shaft and housing tolerances .
Cylindrical roller bearings Needle roller bearings Tapered roller bearings .
Deep groove ball bearings Single row angular contact ball bearings Four-point contact ball bearings Hybrid angular contact ball bearings .
PTFE seal material and manufacturing PTFE seal applications in twin screw compressors [pdf]
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