Nkọwapụta
a) Mere nke transperent iko resin PC. Iji ụlọ ọrụ 3M gluu.
Nlekọta anya na-echekwa nchekwa karịa, akụrụngwa na-apụta ìhè, dị mfe na nke doro anya iji hụ ọnọdụ mgba ọkụ.
b) Ozugbo ekpochichara, gbochie valvụ ahụ ka ọ ghara ịtụgharị.
c) The isi na-enye ohere iji na abụọ semicircles nabata valvụ.
d) Na-anabata valvụ. Ruo 55 mm dayameta na 43mm ogologo.
e) Dabara 32 mm-46 mm dayameta valvụ.
