valve seating的用法和樣例：
例句
- Every one passes the tp that strict technology tests, adopt the wear-resisting valve core.
每一個都經過嚴格技術測試的龍頭，採用磨閥芯。 - As the camshaft rotates, the lobe, or high spot of the cam, pushes against parts connected to the stem of the valve.
當凸輪軸旋轉時，凸輪凸起的或者高點的位置，推動氣門座。 - Flat seating faces for low and medium pressures.
適用於中低壓力的平面閥座表面。 - Thoroughly clean the seating area.
徹底清洗閥座表面。
