TASK DEFINITION: Translate the given Spanish text to English
PROBLEM: The preparation involves a hydrocyanation reaction.

SOLUTION: La preparacion involucra una reaccion de hidrocianacion.

PROBLEM: The pipe (10) comprises a radially inner portion (11) and a radially outer portion (13), with the two portions (11, 13) merging together to provide an integrated tubular wall structure.

SOLUTION: El tubo (10) comprende una porción radialmente interna (11) y una porción radialmente externa (13), con las dos porciones (11, 13) que se unen para proporcionar una estructura de pared tubular integrada.

PROBLEM: This composition has excellent effect for controlling plant disease.

SOLUTION:
Esta composición tiene un excelente efecto para el control de fitoenfermedades.