When i was child , my mother had a trip with me , i felt the comforter in the hotel much heavy and harder than those in the home , i asked why , my mother told me that our comforter was made of silk which comes from silkworm , called silk cotton , therefore , it feels much soft , better heat isolate and lighter , this was first time i knew silkworm 在我很小的時候,媽媽帶我去玩,我們住的酒店的被子比我在家蓋的被子又沉又硬,我問媽媽這是怎么回事,媽媽說,是因為我們家的被子是蠶吐出的絲做成的,叫絲棉,所以又軟、又暖、又輕,這是我第一次知道“蠶” 。
Etc . heaters mosi2 , sic for annealing furnace and single crystal furnace , high purity oxides high purity rear earth oxides , sio2 , al2o3 , tio2 , ti2o3 and ti3o5 etc . for crystal growth and optical coatings . w , mo crucibles and w , mo products for crystal growth , fire - resistant materials and products for heat isolating during crystal growth Etc . ,退火爐及單晶爐用發(fā)熱體硅化鉬,炭化硅,晶體生長和光學鍍膜用高純氧化物稀土氧化物,二氧化硅,三氧化鋁,二氧化鈦,三氧化二鈦,五氧化三鈦等,生長晶體用鎢鉬坩堝及鎢鉬制品和保溫用各種耐火材料及制品。