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Дахин боловсруулах гэж юу вэ: шинж чанар, давуу тал, …
Дахин боловсруулах нь материал цуглуулах, шинэ бүтээгдэхүүн болгох үйл явц юм; эс бөгөөс эдгээр бүтээгдэхүүнийг хог болгон хаях болно. Гурван үндсэн төрөл байдаг. Анхдагч эсвэл хаалттай давталт нь материалыг ижил материал болгон хувиргадаг.жишээ нь, илүү их цаасан … See more
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