Collective bargaining. Written By: Collective bargaining, the ongoing process of negotiation between representatives of workers and employers to establish the conditions of employment. The collectively determined agreement may cover not only wages but hiring practices, layoffs, promotions, job functions, working conditions and hours, worker discipline and termination, and benefit programs.
Three Parts:Building the Siren's Spinning CylinderBuilding the Siren's Outer PortionFinishing the SirenCommunity Q&A. The distinct rising and falling sound of an air raid siren is produced by a relatively simple machine. While the flatter pitch of most modern emergency vehicle sirens requires electronic circuitry to reproduce, the mechanical siren can be made with basic carpentry tools.
1. siren song (or call). Used in reference to the appeal of something that is alluring but also potentially harmful or dangerous: a mountaineer who hears the siren song of K2. More example sentences. 1  Two minutes before curtain up, the performer hears the siren call of a proper job in a bank.iddle English (denoting an imaginary type of snake): from Old French sirene, from late Latin Sirena, feminine of Latin Siren, from Greek SeirÄn. More. In classical mythology the Sirens were bird-women whose beautiful singing lured sailors to their doom on submerged rocks.