求翻译：芳纶被称为“全能纤维”，其用途十分广泛，但芳纶合成技术难度较大，且国外对我国封锁合成技术，尽管我国对芳纶生产和应用的研发已经取得了一定的成果，但是与国外芳纶比较起来仍存在许多缺点。是什么意思？

Kevlar known as "all fiber" and its use is widespread, but aramid synthesis difficult, and the foreign block synthesis technology in China, despite China's Kevlar production and application of R & D has achieved certain results, but there are still many shortcomings in comparison with foreign ar

Aramid fiber fabric is known as "the mighty" and its use is widespread, but 10 aramid fiber composite technology it is quite difficult, and the blockade against our country abroad synthesis technology, despite the fact that my yarns on the production and application research and development has been

The fragrant black silk ribbon is called “the versatile textile fiber”, its use is extremely widespread, but the fragrant black silk ribbon synthesis technology difficulty is big, also overseas blocks the synthesis technology to our country, although our country has already yielded certain result to

Aramid is called "total fiber", and its purpose very broad, but Kevlar synthesis is quite difficult, blocking synthesis technology in China and abroad, although research and development on production and application of aramid in China has achieved some success, but with aramid compared to many short

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