lead riser的用法和樣例：
例句
- By reasonable useof kiss riser,highg quality of these castings and higher casting yield can be obtained.
合理使用壓邊澆冒口，有效地提高了有色合金鑄件的質量和工藝出品率。 - Important considerations are the rate at which a mold cavity is filled ,gate placement ,riser design ,the use of chill blocks, and padding.
著重集中在型腔如何灌注，進模口的布置，冒口的設計，冷硬試件的使用，墊模這些方面。
