1. N-gun atsam hte n-gun atsam hpe hkye la lu ai: Vacuum freeze dryers ni gaw vacuum hte low-temperature hte hkyet lu ai ladat hpe jai lang ai majaw, htunghking ladat ni hte shingdaw yang grau hkyet lu ai, dai sha n-ga, n-gun lang ai lam hte n-gun n-gun hpe mung shayawm ya lu ai.
2. Material Quality hpe makawp maga ai lam: Vacuum freeze dryers ni gaw, n-gun ja ai -temperature oxidation hte n-gun ja ai -hkam sha ai arung arai ni hpe sum mat ai hpe koi lu ai majaw, arung arai ni a nsam, nsam, hte malu masha arung arai ni hpe makawp maga ya lu ai, arung arai ni a hkamja lam hpe grau kaja hkra galaw ya lu ai.
3. Loi ai hku galaw na matu: Vacuum freeze dryer ni gaw, shi hkrai shi hkang ai ladat hpe lang ai majaw, galaw na matu loi ai hte shim lum ai. Shanhte gaw matut manoi galaw shapraw lu shangun nna, bungli galaw ai lam hpe grau kaja hkra galaw ya ai.
4. grup yin hpe makawp maga ai hte shim lum ai: Vacuum freeze dryer ni gaw katsi ai shaloi chemical reagents n ra ai sha n-ga, n kaja ai gas (sh) n kaja ai hka ni hpe mung n shapraw ai majaw grup yin hpe awu asin n byin shangun ai. Dai hta n-ga, dai jak gaw, hka ja ai aten hta, arung arai ni hpe n-gun n rawng hkra galaw ya nna, malu masha hte tsi hpaga lam ni hta san seng ai madang ni hpe hkan sa ya ai.
