日前，美贸易代表办公室（USTR）公布了针对第二批340亿美元关税排除清单内商品加征有效期延长的公告，该批排除清单于2019年3月25日已做第一次排除，有效期原定于2020年3月25日到期。本次公告决定，将部分商品的排除有效期自2020年3月25日起，延长一年。此次排除公告美国贸易代表办公室公告地址：https://ustr.gov/sites/default/files/enforcement/301Investigations/Notice_of_Extensions_for_Exclusions_Expiring_March_2020.pdf此次涉及延长至2021年3月25日的产品2019年3月25日排除公告地址：https://ustr.gov/sites/default/files/enforcement/301Investigations/84_FR_11152.pdf此次未获得延长有效期的包括19个税号下22个品项的商品，将于2020年3月25日到期后，被移出排除清单。即2018年7月6日至2020年3月25日期间，这些商品可免加征关税，但从2020年3月25日起，恢复额外加征关税25%。（名单见列表２）此次获得有效期延长的共涉及11项商品，包括2个税号下的完全排除商品和7个税号下9个品项部分排除商品。具体如下：排除商品列表１2019年3月25日美方发布301征税340亿清单第二批产品排除目录 继续排除至2021年3月25日全部排除税号美国税号具体排除产品（英文版）具体排除产品（中文参考版）8412.21.00458607.21.1000部分排除税号美国税号具体排除产品（英文版）具体排除产品（中文参考版）8413.81.0040Breast pumps， whether or not with accessories or batteries吸乳器，不论是否带有配件或电池8421.21.0000Machinery for filtering water, submersible, powered by batteries, manually operated, such machinery designed for use in pools, basins, aquariums, spas or similar contained bodies of water潜水用水过滤机械，由电池供电，手动操作，此类机械设计用于水池，水池，水族馆，水疗中心或类似的封闭水体8421.21.0000Hand-held ultraviolet water；purifiers，powered by batteries。手持式紫外线水;由电池供电的净化器。8421.22.0000Filters designed to remove sulfites from win用于去除葡萄酒中亚硫酸盐的过滤器8421.99.0040Filter housings，covers，or couplings，the foregoing of steel and comprising parts of machinery or apparatus for filtering liquids过滤器外壳，盖子或联轴器，上述钢材，包括用于过滤液体的机器或设备部件8431.49.9095Vulcanized rubber tracks. each incorporating cords and cleats of steel，designed for use on construction equipment硫化橡胺履带，每根都包合钢丝绳和夹板，设计用于建筑设备8501.10.4020Electric motors，AC， permanent split capacitor type， each in a housing with outside diameter of 84 mm or less， with output of 6W or more but not exceeding 16w电动机，交流电，永久分高电容器型，每个都在外径为84毫米或以下的外売中，输出功率为6瓦或以上但不超过16瓦8471.70.6000Automated data processing storage units （other than magnetic disk drive units）， not assembled in cabinets for placing on a table or similar place， not presented with any other unit of a system自动数据处理存储单元（磁盘驱动器单元除外），未组装在机柜中放置在桌子或类似场所，未与系统的任何其他单元一起提供9027.90 5650Inoculator sets of plastics， each consisting of a plate with multiple wells，a display tray，and a lid；when assembled， the set measuring 105 mm or more but not exceeding 108 mm in width 138 mm or more but not exceeding 140 mm in depth， and 6.5 mm or less in thickness接种器塑料组，每个塑料组有多个孔的板，一个展示托盘和一个盖子组成；组装时，该组件的宽度为105毫米或以上但不超过108毫米，深度为138毫米或以上但不超过140毫米，厚度为6.5毫米或以下此次没有在排除名单内商品共涉及19个税号22个品项，恢复加征25%关税名单。未排除商品列表２2019年3月25日美方发布301征税340亿清单第二批产品排除目录 此次没有排除，恢复加征25%关税名单美国税号恢复加征25%关税产品（英文版）恢复加征25%关税产品（中文参考版）8430.31.0040所有商品8413.70.2004Submersible centrifugal pumps，each powered by 36 v motor潜水离心泵，毎台由36V电机供电8413.91.9095Impellers of plastic designed for centrifugal pumps,each of the foregoing with outside dianeter of 73 mm or more but not more than 74 mm.(described in statistical reporting number 8413.91.9095, effective January 1, 2019; described in statistical reporting number 8413.91.9080, effective prior to January 1, 2019)铸铁叶轮外壳；为离心泵设计的塑料叶轮，上述每根外径为73毫米或以上但不超过74臺米。2019年1月1日之前编码：8413.91.9080，1月之后编码：8413.91.90958413.91.9095Impeller housings of cast iron(described in statistical reporting number 8413.91.9095, effective January 1, 2019; described in statistical reporting number 8413.91.9080, effective prior to January 1, 2019)铸铁叶轮外壳。2019年1月1日之前编码：8413.91.9080，1月之后编码：8413.91.90958414.90.4165Compressor housings designed for turbochargers为涡轮增压器设计的压縮机壳体8421.19.0000Salad spinners，of plastics，not electrically powered塑料沙拉旋转器，非电动8421.21.0000Machinery designed for removing waste from water in saltwater aquariums by injecting air bubbles then filtering such bubbles通过注入气泡然后过滤掉气泡来从盐水水族馆的水中去除废物的机械8421.21.0000Electronic water oxidizers designed for purifying water for household washing machines设计用于净化家用洗衣机水的电子水氧化剂8428.32.0000Steel L-shaped bucket elevator，each comprising steel buckets bolted to a steel chain with guide wires and drive system钢制L形斗式提升机，每个都包括用栓固定在钢上的钢制支架，带有导丝和驱动系统8439.91.9000Rotors designed to agitate paper and water into pulp，of stainless steel， the foregoing comprising parts of machinery for making pulp of fibrous cellulosic materials设计用于将纸和水搅拌成不锈钢纸浆的转子，前述包括用于制造纤维状纤维素材料纸浆的机器部件8479.10.0060Bituminous pavers， self-propelled， each with a weight exceeding 14.9 metric tons but not exceeding 18.2 metric tons，with working width of 2.4m or more but not over 8.6m自行式沥青摊铺机，每个摊铺机的重量超过14.9公吨但不超过18.2公吨，工作宽度为2.4米或以上但不超过8.6米8481.30.9000Check valves，of acrylonitrile butadiene styrene（ABS）， each weighing 120 g or lesss丙烯腈丁二烯苯乙烯（ABS）止回阀，每只重量不超过120 g8481.30.9000Check valves， of plastics塑料止回阀8501.31.5000DC motors rated at 739.6 W， each with a housing with external diameter of 85 mm or more but not exceeding 90 mm and weight of 257 g or less额定功率为739.6W的直流电机，每个外壳的外径为85mm或以上但不超过90mm，重量力257g或以下8504.32.0000Electrical transformers，each with a power handling capacity rating of 1.8KVA，with external dimensions measuring approximately 13.3 cm by 12.7 cm by 11.4 cm电力変压器，每个的功率处理能力等级为1.8千伏安，外部尺寸约为13.3厘米×12.7厘米×11.4厘米8515. 11.0000Battery powered soldering irons or soldering guns，not over 18 cm in length电池供电的烙铁或焊枪，长度不超过18厘米8538.90.6000Knos of injection molded plastics注塑塑料旋钮8539.90.0000Molybdenum foil filament assemblies，designed for use in ultraviolet lamps设计用于紫外线灯的钼箔灯丝组件9013. 80.7000Thinfilm-transistor， light emitting diode（LED）backlit flat panel liquid crystal display modules， each with an aluminum bezel and a video display diagonal measuring 113 mm or more but not over 339 mm薄膜晶体管，发光二极管（LED）背光平板液晶显示模块，每个都带有铝质边框和113毫米或以上但不超过339毫米的视频显示对角线9014.80.2000Depth-sounding apparatus with digital display，each designed｛ for installation in a 63.5mm hole in dashboard， designed for recreational boating use具有数字显示功能的深度测量设备,每个设计用于安装在仪表板的63.5mm孔中，设计用于休闲划船用途9018.90. 7580Restraint packs designed for use with chest compressors， each containing one torso restraint，consisting of a cotton strap which fastens with hook and loop fasteners to the compressor，and one cover for a head stabilizer设计用于胸部压缩机的约束包，每个包合一个躯干约束装置，包括一个用钩环紧固件固定在压缩机上的棉带和一个用于头部稳定器的盖子9031.80.8085Tuners designed to clip onto musical instruments and indicate whether the instrument is in tune调音器设计用于夹在乐器上并指示乐器是否合格