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