並前往https://books.google.com.tw/books?id=l-vIORbrKvwC&pg=PA102&lpg=PA102&dq=valve&source=bl&ots=LANL4A2SM9&sig=ACfU3U0vHYsbLi8n0RXf_auFuHvY71ROwQ&hl=zh-TW&sa=X&ved=2ahUKEwit4_yu9aH9AhVdg1YBHS95DFYQ6AF6BQjuAhAD