常見例句雙語例句The hand wheel, the screw rod, the standby cap and the top sleeve are assembled and connected in a valve body.它是由在閥體內(nèi)裝配連接的手輪、螺桿、備帽、頂套及裝于螺桿下的標(biāo)準(zhǔn)球和密封墊組合而成。ip.com 返回 valve body cap screw