ˮþΪԵĻԭϣŹ㷺;ӹҵϵũҵϣҽƼʳƷͬˮþŲͬáΪ;IJͬиݿͻͬþĿǰҪõĿԷΪ¼ֹ
1. Сˮþ0.1-1mm
2. пˮþ1-3mm
3. ˮþ2-4mm
4. شˮþ4-7mm
þΫͬˮþƷŲͬҪȻ۸ҲͬԵҪɹˮþʱҪѡ
Żȡ
ɨһɨ