硬包装 meaning in English

rigid package

Test methods for water vapor transmission of rigid containers
硬包装容器透湿度试验方法
Foreign entries sent with over - sized hard containers exceeding 90cm in length , width and depth combined or weighing more than 2 kg will not be returned in accordance with local postal regulations for “ printed matter ” mails , unless an extra return postage of us $ 10 . 00 surface mail is included
海外参加者作品，己装裱或硬包装的长宽厚三者合计超过90厘米或重量超过两公斤，除非预付额外（包裹）邮费美金10元（平邮）否则将根据本国印刷品包裹的邮政条例不予退回