| 摘要 |
PURPOSE:To prevent the deterioration of grease due to a temperature rise and the bending of the titled boot due to the negative pressure generating as a result of penetration to outside of air in the boot, by a method wherein a non-magnetic metal is coated on the surface of the flexible boot by a vacuum deposition method. CONSTITUTION:Non-magnetic metal is coated on the surface of a flexible boot 1 by a vacuum deposition method to thereby form a metallic layer 5 on that surface so that the radiation of heat from outside is reflected on the metallic layer 5 and the gas within the boot is prevented from penetrating outside the boot. For the above mentioned non-magnetic metals, aluminum, stainless steel, etc. are used. |
