Hard chrome plated pistion and pump plunger ensuer durability and corrosion resistance. Foot switch board has quick lowering function when unload.是什么意思_Hard chrome plated pistion and pump plunger ensuer durability and corrosion resistance. Foot switch board has quick lowering function when unload.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句