Choyamba, makhalidwe: 1, High mphamvu, toughness mkulu, mkulu amakwawa kukana, makokedwe mkulu: ntchito kwa zovekera chitoliro, mfundo, matupi valavu, etc. ndi zina ulusi mkati thandizo ndi chitetezo.2, High kutentha kukana, hydrolysis kukana, UV kukana: zipangizo zachipatala ...
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