paper tube是什么意思

用法例句

mongolica , afforestation experiments through wind blocking with plostic film tubes or paper tubes were carried out on Saihanba Tree Farm.

为提高樟子松的造林成活率，在塞罕坝机械林场进行了樟子松塑料膜筒和纸筒护苗防风造林试验，结果可使樟子松春、夏造林成活率提高２０％以上。

The composite paper barrel is used as external packaging and PET/AL/PE composite film bag as internal packaging, which is a kind of new—type packaging design for explosives.

用复合纸筒外包装和PET/AI/PE复合薄膜包装袋的内包装,是火炸药的一种新型包装设计,通过工艺研究试验和部队运输,长储等实际考核,证明可达到美军火药包装乙级标准,纸筒包装炸药可达美军通用标准。

According to the characteristics of sugarbeet paper -pot cultivation in the main growing region of Heilongjiang province,we conducted an improvable trial on the original Zhongtian-1special fertilizer for sugarbeet paper-pot cultivation.

根据黑龙江省甜菜纸筒育苗主产区的生产和管理特点,对原“中甜一号甜菜纸筒育苗苗床专用肥”进行了较为系统的配方改进试验。