比较 HS 编码
输入最多 5 个 HS-6 编码（逗号分隔），并排比较说明与各国对应编码。
8421.39
Machinery; for filtering or purifying gases, other than intake air filters, catalytic converters or particulate filters for internal combustion engines
US 842139
US 8421.39.01
AE 842139
AR 842139
AU 842139
BR 842139