1·China is the world's biggest producer of screws, nuts, bolts and washers, while the EU is its biggest market.
中国是世界上最大的螺丝钉、螺母、螺栓和垫圈生产商，而欧盟是这些商品的最大市场。
2·Operate and monitor screening equipment, bleaching equipment, digesters, mixing tanks, washers, and other pulp processing machinery and equipment to carry out one or more cellulose processing steps.
操作和监视筛分设备，漂白设备，沼气池，搅拌罐，垫圈及其他浆粕加工机械和设备，开展一个或多个纤维素处理步骤。
3·These indications shall not be placed on screws, removable washers or other parts which can be removed when conductors are being connected.
这些表示符号不应放在螺钉、可取下的垫圈或在连接导线时能被取下的其他部件上。
4·Overtightened washers can be distorted into the connection's threads, making disassembly or washer removal difficult.
过紧的垫圈会扭曲到接头的螺纹里，使拆卸或取掉垫圈变得很困难。
5·Remove the screws, washers and nuts from the lock handles for the air inlet duct.
从进气管道的锁手柄上拆下螺栓、垫圈和螺母。