Tribological Properties of SiN-hBN Composite Ceramics Bearing on GCr15 under Seawater Lubrication.

This paper concerns a comparative study on the tribological properties of SiN-10 vol% hBN bearing on GCr15 steel under seawater lubrication and dry friction and fresh-water lubrication by using a pin-on-disc tribometer. The results showed that the lower friction coefficient (around 0.03) and wear rate (10 mm/Nm) of SN10/GCr15 tribopair were obtained under seawater condition.

[Design and development of a massaging machine for the lumbar vertebrae diseases].

This paper introduces the designing process of a massaging machine on the basis of Pro/Engineer. The machine has realized the virtual design and movement simulation for the product. It's computer-controlled system has greatly improved the automatic level of the massaging machine which has broad prospects for popularization and application.

[Design and clinical application of a three-dimensional biomechanical traction appliance for protrusion of intervertebral disc].

A three-dimensional biomechanical tracting appliance is introduced in the article, which is used to treat the protrusion of intervertebral disc. The appliance is light, practical, adjustable 3D biomechanic, simple and with multiple functions and convenient operation.