许多联结的法兰盘需要安装在有限的空间内,这种情况在柴油机及其附件上並不比其他工程领域少。还有,不少法兰盘处于气候、热等不利的环境条件下,使联结螺栓拆装困难。所以在最初装配和每次拆卸时,由于卡住的螺栓,剝落的螺纹和受蚀的紧固件而耽误和浪费 Many connected flanges need to be installed in a limited space. This situation is not less in diesel engines and their accessories than in other engineering fields. In addition, many flanges are exposed to unfavorable environmental conditions such as climate and heat, making it difficult to disassemble the connecting bolts. So at the time of initial assembly and each disassembly, delays and wasted due to stuck bolts, peeling threads and eroded fasteners