Установки для нижнего слива (налива) нефти и нефтепродуктов железнодорожных вагонов-цистерн. Технические условия
石油和石油产品的装置从铁路罐车卸载 技术规格
BS 4521-2-1975
Specification for railway turnouts for private users-Light grade turnouts over which British Railways locomotives do not operate, for axle loads not exceeding 10 tons, using flat bottom rails
专用铁路道岔规范 英国铁路机车不运行的轻型道岔 轴重不超过10吨 使用平底轨道
1975-04-30
BS 4521-3.2-1975
Specification for railway turnouts for private users. Medium grade turnouts over which British Railways locomotives do not operate, for axle loads not exceeding 25 tons-Turnouts using flat bottom rails
专用铁路道岔规范 英国铁路机车不运行的中等等级道岔 轴重不超过25吨 平底轨道道岔
1975-04-30
BS 4521-3.1-1974
Specification for railway turnouts for private users. Medium grade turnouts over which British Railways locomotives do not operate, for axle loads not exceeding 25 tons-Turnouts using bull head rail
专用铁路道岔规范 英国铁路机车不运行的中等等级道岔 轴重不超过25吨 使用牛头轨的道岔
1974-12-31
BS 4521-4-1975
Specification for railway turnouts for private users-Heavy grade turnouts over which British Railways locomotives do not operate, for axle loads which may exceed 25 tons, using flat bottom rails
专用铁路道岔规范 英国铁路机车不运行的重型等级道岔 轴重可能超过25吨 使用平底轨道