Je32C4186矩形母线平弯、立弯、扭弯各90°时，弯转部分长度有何规定?
["\u7b54\uff1a(1)\u6bcd\u7ebf\u5e73\u5f2f90\u00b0\u65f6\uff1a\u6bcd\u7ebf\u89c4\u683c\u572850mm\u00d75mm\u4ee5\u4e0b\u8005\uff0c\u5f2f\u66f2\u534a\u5f84R\u4e0d\u5f97\u5c0f\u4e8e2\uff0e5h(h\u4e3a\u6bcd\u7ebf\u539a\u5ea6)\uff1b\u6bcd\u7ebf\u89c4\u683c\u572860mm\u00d75mm\u4ee5\u4e0a\u8005\uff0c\u5f2f\u66f2\u534a\u5f84\u4e0d\u5f97\u5c0f\u4e8e1\uff0e5h\u3002(2)\u6bcd\u7ebf\u7acb\u5f2f90\u00b0\u65f6\uff1a\u6bcd\u7ebf\u572850mm\u00d75mm\u4ee5\u4e0b\u8005\uff0c\u5f2f\u66f2\u534a\u5f84R\u4e0d\u5f97\u5c0f\u4e8e1\uff0e5b(b\u4e3a\u6bcd\u7ebf\u5bbd\u5ea6)\uff1b\u6bcd\u7ebf\u572860mm\u00d75mm\u4ee5\u4e0a\u8005\uff0c\u5f2f\u66f2\u534a\u5f84R\u4e0d\u5f97\u5c0f\u4e8e2b\u3002(3)\u6bcd\u7ebf\u626d\u8f6c(\u626d\u8170)90\u00b0\u65f6\uff1a\u626d\u8f6c\u90e8\u5206\u957f\u5ea6\u5e94\u5927\u4e8e\u6bcd\u7ebf\u5bbd\u5ea6(b)\u76842\uff0e5\u500d\u3002"]