1.卡环 DIN472 J160x4 2.油封 “Cover 62x8 EC NBR 70-N01B-C NAK” or equivalent 3.端盖 90x12 VK90 NBR STEFA 4.油封 DIN3760-FKM A100x120x12 5.O型圈 DIN3771-1NBR 140x3 各两只 谁有货源