229910000831 Steel Inorganic materials 0.000 description 1. 239000010687 lubricating oil Substances 0.000 description 3.239000000314 lubricant Substances 0.000 claims description 9.230000004308 accommodation Effects 0.000 claims abstract description 4.238000000465 moulding Methods 0.000 claims abstract description 6.238000005859 coupling reaction Methods 0.000 claims abstract description 7.238000010168 coupling process Methods 0.000 claims abstract description 7.230000001808 coupling Effects 0.000 claims abstract description 7.
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