![spinneret造句怎麼寫]( "spinneret造句怎麼寫")
- Manytinytubesconnecteachsilkglandwithaspinneret.Usuallythenumberofholesinthespinneretdeterminesthenumberoffilamentintheyarn.“Butifyoulookatasilkworm,itonlyhasonekindofspinneret,”sheadded.Shineandflatpolyesterstaplefiberwasproducedbyusingprofiledspi...
- 13389
中文谷