支し持じ層そう

noun

base of support; support base; supporting layer

Used in political contexts for a party's core supporters, and in technical contexts for a physical supporting layer or substrate.

• この政せい党とうの支し持じ層そうは高こう齢れい者しゃが中ちゅう心しんだ。

  The support base of this political party is mainly elderly people.

• 道どう路ろの支し持じ層そうには砂利じゃりが使つかわれている。

  Gravel is used for the supporting layer of the road.